1- Nasal Cavity, Pharynx and Larynx
Lecture 1 – Upper Respiratory Tract
Objectives By the end of this lecture the student should be able to describe the microscopic structures of: ! Vestibule of the nasal cavity. ! Respiratory mucosa of the nasal cavity. ! Nasal septum. ! Olfactory mucosa of the nasal cavity. ! Mucosa of the paranasal sinuses. ! Larynx. 3- Olfactory 1- Vestibule Region
Para-nasal Sinuses
Respiratory Sinusitis Epithelium
Lamina Propria 2- Respiratory Region
Mucousa “Mucous Membrane” A) Epithelium “respiratory” Pseudo-stratified ciliated columnar with goblet cells B) Lamina Propria
1- Large arterial plexuse & Venous sinuses “Vascular” 2- Many Seroumucous glands “Acini” 3- Abundant Lymphoid elements Site
2- Upper part 1- Roof of of Nasal Nasal Cavity Septum
Structure
A- Olfactory Epithelium > Pseudo-stratified Columnar
Olfactory Cells Bipolar Neurons “olfactory nerve cells”
Sustentacula Supporting Cells Columnar cells. Function > Physical support and nourishment for Olfactory Cells
Basal Cells Pyramidal in shape, basal in position and act as stem cells. B- Lamina Propria > Highly Vascular CT
2- Bundles of 1- Bowmans’s Unmylinated Nerve “Olfactory” Glands Fibers > Axons + > Serous Acini Schwan like cels “Glial”
3- Rich Vascular 4- Numerous Plexuse Lymphoid Elemnts Larynx
A) Mucousa 2- Lamina Propria
1- Epithelium
• Pseudo-stratified Columnar Epithelium With Goblet Cells
• Location: • 1- Vocal Folds • 2- Super Surface of Epiglottis
There are 2 pairs of Shelf-like Mucosal Folds
Epithelium: Non keratinized Respiratory Epithelium Stratified Squamous
Lamine propria Lamina Propria
Loose C.T. with CT Containing seromucous bundles of glands elastic fiber lymphoid elements & and skeletal adipose cells muscles Larynx
B) Cartilages
C) Muscles Ligaments Respiratory Epithelium
Pseudo-stratified Ciliated Columnar Epithelium + Goblet Cells
Stem Cells E.g. Serotonin MCQ’s
1) All of the following are from the conducting 2) Vestibule wall is portion of the respiratory formed by? system except ?! A-Elastic cartilage. A-larynx. B-Compact Bone. B-Terminal Bronchioles. C-Hyaline cartilage. C-Respiratory Bronchioles. D-Fibrocartilage. D-Primary bronchi.
3) which type of cell is responsible for the physical 4) From which type of support and nourishment cartilage the epiglottis is for olfactory cells? made of? A-Goblet cell. A-Elastic cartilage. B-Sustentacular cell B-Hyaline cartilage. C-Basel cell. C-Fibrocartilage. D-Glial cell.
Q5) Which of the following structures does the lamina of the vocal cords of the larynx Lacks? A-Elastic fibers. B-Skeletal muscles. C-Lymphoid nodules. Done By:
Amal Afrah Najd Al Omran
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