Structure Function/Use Mouth Anus Clitellum Setae Anatomical Position

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Structure Function/Use Mouth Anus Clitellum Setae Anatomical Position

REVIEW GUIDES FOR THE EARTHWORM PRACTICUM USE YOUR DIAGRAMS, THE ONES ONLINE, AND THE ANSWERS BELOW TO HELP YOU AS YOU COMPLETE A FINAL REVIEW OF THE EARTHWORM! (IF THE STRUCTURE IS NOT LISTED BELOW, IT IS NOT ON THE PRACTICUM!) EARTHWORM - EXTERNAL Complete the chart below with the functions/uses of the structures listed for the Earthworm. Structure Function/Use Mouth Where the organisms takes in food (soil) to obtain nutirents Anus The location where the organism releases wastes from the body An enlarged area on the anterior end of the organism that secretes mucus aiding in the Clitellum processes of reproduction Setae Bristles on each segment hat help the organism with locomotion (movement) The following positional terms are important when understanding the anatomy of the Earthworm. Describe how you can find the following areas: Anatomical Key Features/Location Position Caudal End The end that contains the anus The top side of the organism that is darker and smoother in nature (The clitellum is intact Dorsal Side on this side of the organism The bottom side of the organism that is lighter on color (Segmentation is seen through the Ventral Side clitellum on this side) EARTHWORM - INTERNAL Complete the chart below with the functions/uses of the structures listed for the Earthworm. Structure Function/Use Helps the earthworm pull in food through its mouth with this structure; it’s a muscular Pharynx structure Aortic Arches (5) Act as the “hearts” of the organism, circulating blood throughout the body Seminal Vesicles Secretes sperm used for the earthworm to reproduce Tube that carries food/soil from the pharynx to the crop (The aortic arches surround the Esophagus esophagus) Crop Thin walled organ that acts as a temporary storage place for food Muscular organ where food is forced from the crop; The rhythmical contractions Gizzard cause grains of sand to rub the food particles together; It grinds up food. Location where digestion continues after gizzard grinds food (Chemical processes occur Stomach here) The blood vessel that runs along the dorsal side of the worm (can be seen from the Dorsal Blood Vessel outside); The blood runs along this vessel from the aortic arches to the rest of the body. .

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Reference Sheet 1
MALE SEXUAL SYSTEM 8 7 8 OJ 7 .£l"00\.....• ;:; ::>0\~ <Il '"~IQ)I"->. ~cru::>s ~ 6 5 bladder penis prostate gland 4 scrotum seminal vesicle testicle urethra vas deferens FEMALE SEXUAL SYSTEM 2 1 8 " \ 5 ... - ... j 4 labia \ ""\ bladderFallopian"k. "'"f"";".'''¥'&.tube\'WIT / I cervixt r r' \ \ clitorisurethrauterus 7 \ ~~ ;~f4f~ ~:iJ 3 ovaryvagina / ~ 2 / \ \\"- 9 6 adapted from F.L.A.S.H. Reproductive System Reference Sheet 3: GLOSSARY Anus – The opening in the buttocks from which bowel movements come when a person goes to the bathroom. It is part of the digestive system; it gets rid of body wastes. Buttocks – The medical word for a person’s “bottom” or “rear end.” Cervix – The opening of the uterus into the vagina. Circumcision – An operation to remove the foreskin from the penis. Cowper’s Glands – Glands on either side of the urethra that make a discharge which lines the urethra when a man gets an erection, making it less acid-like to protect the sperm. Clitoris – The part of the female genitals that’s full of nerves and becomes erect. It has a glans and a shaft like the penis, but only its glans is on the out side of the body, and it’s much smaller. Discharge – Liquid. Urine and semen are kinds of discharge, but the word is usually used to describe either the normal wetness of the vagina or the abnormal wetness that may come from an infection in the penis or vagina. Duct – Tube, the fallopian tubes may be called oviducts, because they are the path for an ovum.
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