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A Handy Guide to the Male and Female Reproductive Tracts
BASICS OF LIFE BY LES SELLNOW eproduction in all species borders on the miraculous. at the reproductive organs of both the mare and the stallion How else can one describe a process where two infini- and discuss just how they function in their effort to produce Rtesimal entities, one from the male, the other from the another “miracle.” Once again, sources are too numerous to female, join forces to produce living, breathing offspring? mention, other than to say that much of the basic informa- Reproductive capability or success varies by species. Mice tion on reproduction available today stems from research at and rabbits, for example, are prolific producers of offspring. such institutions as Colorado State University, Texas A&M Horses, on the other hand, fall into a category where it is University, and the University of Minnesota. There are many much more chancy. others involved in reproductive research, but much of the in- When horses ran wild, this wasn’t a serious problem. There formation utilized in this article emanated from those three were so many of them that their numbers continued to ex- institutions. pand even though birth rate often was dictated by the avail- ability of food and water. Once the horse was domesticated, The Mare however, organized reproduction became the order of the We’ll begin with the mare because her role in the repro- day. Stables that depend on selling the offspring of stallions ductive process is more complicated than that of the stallion. and mares have an economic stake in breeding success. Yet, Basically, the mare serves four functions: the process continues to be less than perfect, with success 1) She produces eggs or ova; rates hovering in the 65-70% range, and sometimes lower. -
Differential Studies of Ovarian Endometriosis Cells from Endometrium Or Oviduct
European Review for Medical and Pharmacological Sciences 2016; 20: 2769-2772 Differential studies of ovarian endometriosis cells from endometrium or oviduct W. LIU1,2, H.-Y. WANG3 1Reproductive Center, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China 2Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Medical University of Anhui, Hefei, Anhui, China 3Department of Gynecologic Oncology, Anhui Provincial Cancer Hospital, the West Branch of Anhui Provincial Hospital, Hefei, Anhui, China Abstract. – OBJECTIVE: To study the promi- In most cases, EMT affects ovary and peritone- nent differences between endometriosis (EMT) um, and as a result a plump shape cyst forms in cells derived from ovary, oviduct and endometri- the ovary. The cyst is called ovarian endometrio- um, and to provided new ideas about the patho- sis cyst (aka ovarian chocolate cyst) which usually genesis of endometriosis. PATIENTS AND METHODS: contains old blood and is covered by endometrioid From June 2010 1 to June 2015, 210 patients diagnosed with en- epithelium. In 1860, Karl von Rokitansky studied dometriosis were enrolled in our study. Patients the disease and observed retrograde menstruation were treated by laparoscopy or conventional in nearly 90% of child-bearing women, and later surgeries in our hospital. Ovarian chocolate proposed “retrograde menstruation implantation cyst and paired normal ovarian tissues, fimbri- theory”. However, this theory explained endo- ated extremity of fallopian and uterine cavity en- metriosis in the abdominopelvic cavity does not domembrane tissues were collected, prepared 2 and observed by microscope. PCR was used for explain endometriosis outside of enterocelia . Lat- 3 4 amplification of target genes (FMO3 and HOXA9) er on, Iwanoff and Meyer proposed “coelomic and Western blot was used to evaluate FMO3 metaplasia theory” which stipulated that endome- and HOXA9 expression levels. -
Gametogenesis: Spermatogenesis & Oogenesis -Structure of Sperm and Egg Fertilization
Gametogenesis: Spermatogenesis & Oogenesis ‐Structure of Sperm and Egg Fertilization ‐ Definition, Mechanism Early development in Frog ‐ Cleavage, Blas tu la, GtlGastrula, DitiDerivatives of Germ layers Vikasana - CET 2012 y Human reproduction y Brief Account of Fertilization: Implantation, Placenta, Role of Gonadotropins and sex hormones , Menstrual cycle. y Fertility Control: Family Planning Methods- y Infertility Control: Meaning, Causes,Treatment y STD: AIDS , Syphilis and Gonorrhea Vikasana - CET 2012 1.Primary Oocyte is a) Haploid (n) b) Diploid (2n) c) Polyploid d) None of the above Vikasana - CET 2012 2.Secondary Oocyte is a) Haploid (n) b) Diploid (2n) c) Polyploid d) None of the above Vikasana - CET 2012 3.Centrioles of sperm control a) Movement of tail b) Hap lo id numb er of ch romosomes c) Help in fertilization d) None of the above. Vikasana - CET 2012 4.The Fertilization membrane is secreted because a) It checks the entry of more sperms after fertilization b) it checks the entry of antigens in ovum c))p it represents the left out tail of the sperm d) it represen tVikasanas the p - l CETasma 2012 mem brane of the sperm 5.Meiosis I occurs in a) Primary spermatocytes b) Secondary spermatocytes c) Both a and b d) Spermatogonia Vikasana - CET 2012 6.Meiosis II occurs in a) Secondary oocyte b))y Primary oocyte c) Spermatogonia d) Oogonia Vikasana - CET 2012 7.Axial filament of sperm is formed by a) Distal centriole b) Prox ima l centitrio le c) Mitochondria d) DNA Vikasana - CET 2012 8.Polar bodies are formed during a) oogenesis -
Anatomy of Male Reproductive System
Reproductive System Anatomy of Male Reproductive System Function: producing offspring Major Organs propagation of the species External Reproductive Organs !in terms of evolution penis and scrotum – the only reason all the other systems exist Internal Organs: only major system that doesn’t work continuously ! only activated at puberty these structures form continuous tube: unlike most other organisms on planet Testes ! mammals only reproduce sexually epididymus humans are dieocious vas deferens ! separate sexed (many animals are monoecious or ejaculatory duct hermaphrodites) urethra in penis th in 7 week of embryonic development genes are activated that trigger differentiation of gonads Accessory organs seminal vesicles prostate gland bulbourethral glands 1. Penis and Scrotum penis is transfer organ glans ! expanded head prepuce ! foreskin both have modified sebaceous glands that produce waxy secretion = smegma Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4 1 Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4 2 a. seminiferous tubules penis contains erectile tissues that surrounds (700’ of seminiferous tubules in testes) the urethra ! functions in spermatogenesis: ! fill with blood during sexual arousal formation and maturation of sperm cells corpus spongiosum (lower – surrounds urethra) passes along ventral side of penis and in cross section: encloses urethra seminiferous tubules appear roughly circular and contain germinal epithelium 2 coropora cavernosum (upper) (containing germ cells) and sustentacular on dorsal side (Sertoli) cells Sertoli cells protect germ cells and promote all contain numerous tiny blood sinuses their development = lacunae b. interstitial cells scrotum keeps testes at cooler temperature are scattered between the seminiferous tubules ! sperm can only be produced at several degrees below function in hormone secretion normal body temp !testosterone 2. -
Luteal Phase Deficiency: What We Now Know
■ OBGMANAGEMENT BY LAWRENCE ENGMAN, MD, and ANTHONY A. LUCIANO, MD Luteal phase deficiency: What we now know Disagreement about the cause, true incidence, and diagnostic criteria of this condition makes evaluation and management difficult. Here, 2 physicians dissect the data and offer an algorithm of assessment and treatment. espite scanty and controversial sup- difficult to definitively diagnose the deficien- porting evidence, evaluation of cy or determine its incidence. Further, while Dpatients with infertility or recurrent reasonable consensus exists that endometrial pregnancy loss for possible luteal phase defi- biopsy is the most reliable diagnostic tool, ciency (LPD) is firmly established in clinical concerns remain about its timing, repetition, practice. In this article, we examine the data and interpretation. and offer our perspective on the role of LPD in assessing and managing couples with A defect of corpus luteum reproductive disorders (FIGURE 1). progesterone output? PD is defined as endometrial histology Many areas of controversy Linconsistent with the chronological date of lthough observational and retrospective the menstrual cycle, based on the woman’s Astudies have reported a higher incidence of LPD in women with infertility and recurrent KEY POINTS 1-4 pregnancy losses than in fertile controls, no ■ Luteal phase deficiency (LPD), defined as prospective study has confirmed these find- endometrial histology inconsistent with the ings. Furthermore, studies have failed to con- chronological date of the menstrual cycle, may be firm the superiority of any particular therapy. caused by deficient progesterone secretion from the corpus luteum or failure of the endometrium Once considered an important cause of to respond appropriately to ovarian steroids. -
Oogenesis [PDF]
Oogenesis Dr Navneet Kumar Professor (Anatomy) K.G.M.U Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Development of ovum (oogenesis) • Maturation of follicle • Fate of ovum and follicle Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Site – ovary • Duration – 7th week of embryo –primordial germ cells • -3rd month of fetus –oogonium • - two million primary oocyte • -7th month of fetus primary oocyte +primary follicle • - at birth primary oocyte with prophase of • 1st meiotic division • - 40 thousand primary oocyte in adult ovary • - 500 primary oocyte attain maturity • - oogenesis completed after fertilization Dr Navneet Kumar Dr NavneetKumar Professor Professor (Anatomy) Anatomy KGMU Lko K.G.M.U Development of ovum Oogonium(44XX) -In fetal ovary Primary oocyte (44XX) arrest till puberty in prophase of 1st phase meiotic division Secondary oocyte(22X)+Polar body(22X) 1st phase meiotic division completed at ovulation &enter in 2nd phase Ovum(22X)+polarbody(22X) After fertilization Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Dr Navneet Kumar Dr ProfessorNavneetKumar (Anatomy) Professor K.G.M.UAnatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Primordial follicle -Follicular cells Primary follicle -Zona pallucida -Granulosa cells Secondary follicle Antrum developed Ovarian /Graafian follicle - Theca interna &externa -Membrana granulosa -Antrial -
Glossary of Terms
Term English Definition Abstinence Sexual abstinence is not having vaginal, anal or oral sex. Acne Secretions from the skin's oil glands that plug the pores. Antibiotics Powerful medicines that fight bacterial infections. Anus The anus is the opening in the buttock where waste leaves the body. Bacteria A type of germ that can cause infections. Cervix the lower, narrow part of the uterus (womb) located between the bladder and the rectum. It forms a canal that opens into the vagina, which leads to the outside of the body. Chlamydia Chlamydia is caused by a type of bacteria, which can be passed from person to person during vaginal sex, oral sex, or anal sex. Condoms Condoms come in male and female versions. The male condom (“rubber”) covers the penis and catches the sperm after a man ejaculates. The female condom is a thin plastic pouch that lines the vagina. Consent Permission for something to happen or be done, or agreement to do something. Contraception Intentional use of methods or techniques to prevent pregnancy. Discharge Fluid that carries dead cells and bacteria out of the vagina. Estrogen a group of hormones secreted by the ovaries which affect many aspects of the female body, including a woman's menstrual cycle and normal sexual and reproductive development. Fallopian Tube One of two tubes through which an egg travels from the ovary to the uterus. Fertile the ability to become pregnant. Genital Herbes Genital herpes is a sexually transmitted infection (STI). It is caused by a virus called herpes simplex virus (HSV). Gonorrhea Gonorrhea is caused by bacteria that can be passed to a partner during vaginal, anal, or oral sex. -
Anatomy and Physiology Male Reproductive System References
DEWI PUSPITA ANATOMY AND PHYSIOLOGY MALE REPRODUCTIVE SYSTEM REFERENCES . Tortora and Derrickson, 2006, Principles of Anatomy and Physiology, 11th edition, John Wiley and Sons Inc. Medical Embryology Langeman, pdf. Moore and Persaud, The Developing Human (clinically oriented Embryologi), 8th edition, Saunders, Elsevier, . Van de Graff, Human anatomy, 6th ed, Mcgraw Hill, 2001,pdf . Van de Graff& Rhees,Shaum_s outline of human anatomy and physiology, Mcgraw Hill, 2001, pdf. WHAT IS REPRODUCTION SYSTEM? . Unlike other body systems, the reproductive system is not essential for the survival of the individual; it is, however, required for the survival of the species. The RS does not become functional until it is “turned on” at puberty by the actions of sex hormones sets the reproductive system apart. The male and female reproductive systems complement each other in their common purpose of producing offspring. THE TOPIC : . 1. Gamet Formation . 2. Primary and Secondary sex organ . 3. Male Reproductive system . 4. Female Reproductive system . 5. Female Hormonal Cycle GAMET FORMATION . Gamet or sex cells are the functional reproductive cells . Contain of haploid (23 chromosomes-single) . Fertilizationdiploid (23 paired chromosomes) . One out of the 23 pairs chromosomes is the determine sex sex chromosome X or Y . XXfemale, XYmale Gametogenesis Oocytes Gameto Spermatozoa genesis XY XX XX/XY MALE OR FEMALE....? Male Reproductive system . Introduction to the Male Reproductive System . Scrotum . Testes . Spermatic Ducts, Accessory Reproductive Glands,and the Urethra . Penis . Mechanisms of Erection, Emission, and Ejaculation The urogenital system . Functionally the urogenital system can be divided into two entirely different components: the urinary system and the genital system. -
Female and Male Gametogenesis 3 Nina Desai , Jennifer Ludgin , Rakesh Sharma , Raj Kumar Anirudh , and Ashok Agarwal
Female and Male Gametogenesis 3 Nina Desai , Jennifer Ludgin , Rakesh Sharma , Raj Kumar Anirudh , and Ashok Agarwal intimately part of the endocrine responsibility of the ovary. Introduction If there are no gametes, then hormone production is drastically curtailed. Depletion of oocytes implies depletion of the major Oogenesis is an area that has long been of interest in medicine, hormones of the ovary. In the male this is not the case. as well as biology, economics, sociology, and public policy. Androgen production will proceed normally without a single Almost four centuries ago, the English physician William spermatozoa in the testes. Harvey (1578–1657) wrote ex ovo omnia —“all that is alive This chapter presents basic aspects of human ovarian comes from the egg.” follicle growth, oogenesis, and some of the regulatory mech- During a women’s reproductive life span only 300–400 of anisms involved [ 1 ] , as well as some of the basic structural the nearly 1–2 million oocytes present in her ovaries at birth morphology of the testes and the process of development to are ovulated. The process of oogenesis begins with migra- obtain mature spermatozoa. tory primordial germ cells (PGCs). It results in the produc- tion of meiotically competent oocytes containing the correct genetic material, proteins, mRNA transcripts, and organ- Structure of the Ovary elles that are necessary to create a viable embryo. This is a tightly controlled process involving not only ovarian para- The ovary, which contains the germ cells, is the main repro- crine factors but also signaling from gonadotropins secreted ductive organ in the female. -
FAQ042 -- You and Your Sexuality (Especially for Teens)
AQ FREQUENTLY ASKED QUESTIONS FAQ042 fESPECIALLY FOR TEENS You and Your Sexuality (Especially for Teens) • What happens during puberty? • What emotional changes occur during puberty? • How are sexual feelings expressed? • What is masturbation? • What is oral sex? • What happens during sexual intercourse? • What can I do if I want to have sexual intercourse but I do not want to get pregnant? • How can I protect myself and my partner from sexual transmitted infections during sexual intercourse? • What is anal sex? • What does it mean to be gay, lesbian, or bisexual? • Can I choose to be attracted to someone of the same sex? • What is gender identity? • When deciding whether to have sex, what are some things to consider? • What if I decide to wait and someone tries to pressure me into sex? • What is rape? • What are some things I can do to help protect myself against rape? • What is intimate partner violence? • Glossary What happens during puberty? When puberty starts, your brain sends signals to certain parts of the body to start growing and changing. These signals are called hormones. Hormones make your body change and start looking more like an adult’s (see FAQ041 “Your Changing Body—Especially for Teens”). Hormones also can cause emotional changes. What emotional changes occur during puberty? During your teen years, hormones can cause you to have strong feelings, including sexual feelings. You may have these feelings for someone of the other sex or the same sex. Thinking about sex or just wanting to hear or read about sex is normal. It is normal to want to be held and touched by others. -
Grade 12 Life Science Human Reproduction Notes
KNOWLEDGE AREA: Life Processes in Plants and Animals TOPIC 2.1: Reproduction in Vertebrates Human Reproduction Introduction Structure of Male Reproductive System Structure of Female Reproductive System Main Changes that occur during Puberty Gametogenesis Menstrual Cycle Fertilization and Embryonic Development Implantation and Development Gestation Role of Placenta There are 2 types of reproduction. These are… 1. Sexual and 2. Asexual reproduction We are studying reproduction in humans. Therefore we need to know what is sexual reproduction. Sexual reproduction is reproduction that occurs with the use of gametes. In humans fertilization occurs during sexual reproduction. This means a haploid sperm fuses with a haploid egg to form a diploid zygote. The zygote has 46 chromosomes or 23 pairs of chromosomes therefore it is called diploid. So how many chromosomes does the egg and sperm have? The sperm has 23 chromosomes The egg has 23 chromosomes The zygote then divides by mitosis to produce a large number of identical cells. All the cells have the same number of chromosomes and identical DNA. Some of these cells become differentiated. This means that the cells undergo physical and chemical changes to perform specialized function. Therefore these cells are adapted for their functions. This is how the body parts are formed. Therefore the zygote eventually develops into a fully formed adult. Sexual maturity occur between 11-15. It is known as puberty. During puberty meiosis occurs in the male and female reproductive organs to produce the gametes. Since the gametes are produced by meiosis, each gamete will have a haploid number of chromosomes and each egg or sperm will be genetically different from the other. -
The Mesocolon a Histological and Electron Microscopic Characterization of the Mesenteric Attachment of the Colon Prior to and After Surgical Mobilization
ORIGINAL ARTICLE The Mesocolon A Histological and Electron Microscopic Characterization of the Mesenteric Attachment of the Colon Prior to and After Surgical Mobilization Kevin Culligan, MRCS,∗ Stewart Walsh, FRCSEd,∗ Colum Dunne, PhD,∗ Michael Walsh, PhD,† Siobhan Ryan, MB,‡ Fabio Quondamatteo, MD,‡ Peter Dockery, PhD,§ and J. Calvin Coffey, FRCSI∗¶ uring fetal development, the dorsal mesentery suspends the en- Background: Colonic mobilization requires separation of mesocolon from tire gastrointestinal tract from the posterior abdominal wall. The underlying fascia. Despite the surgical importance of planes formed by these D mesocolon is the adult remnant of that part of the dorsal mesentery structures, no study has formally characterized their microscopic features. associated with the colon.1 In the adult human, the transverse and The aim of this study was to determine the histological and electron micro- lateral sigmoid portions of the mesocolon are mobile whereas the as- scopic appearance of mesocolon, fascia, and retroperitoneum, prior to and cending, descending, and medial sigmoid portions are nonmobile and after colonic mobilization. attached to underlying retroperitoneum.2–4 Classic anatomic teaching Methods: In 24 cadavers, samples were taken from right, transverse, de- maintains that the ascending and descending mesocolon “disappear” scending, and sigmoid mesocolon. In 12 cadavers, specimens were stained during embryogenesis.5,6 In keeping with this, the identification of a with hematoxylin and eosin (3 sections) or Masson trichrome (3 sections). In right or left mesocolon in the adult is frequently depicted as anoma- the second 12 cadavers, lymphatic channels were identified by staining im- lous rather than accepted as an anatomic norm.7 Accordingly, the munohistochemically for podoplanin.