Class Notes (806,766)
Canada (492,430)
BIOC33H3 (127)

lec 1- epithelium

5 Pages
Unlock Document

University of Toronto Scarborough
Biological Sciences
Connie Zavitz

1Epithelium1 Simple Squamous epithelium sec kidney Mammal First distinguish the cortex of the kidney from the medulla see diagram below Identify the glomeruli in the cortex They are small round knots of cells that are scattered between the ducts of the cortex Glomeruli are the main filitration unit of the kidney Lining the outer margin of the space around the glomerulus are the cells of Bowmans capsule These cells are simple squamous epithelium Thin in crosssection with dark staining nuclei You can also see simple squamous epithelium forming the walls of the thin segments of the loops of Henle in the medulla of the kidney2 Stratified Squamous epithelium smear Human In this smear squamous epithelial cells are spread widely kind of like spreading pieces of a jigsaw puzzle around Note the pancakelike appearance of these cells stained blue with darker staining nuclei You can not really appreciate the stratified nature of these cells from this section For this see the plantar skin slide 3 Plantar Skin Stratified Squamous Keratinizing epithelium sec Human This is a section through thick skin such as is found on the palm of the hand or the sole of the foot Here the function of the epithelium is protective As the skin is subject of much wear and tear the squamous cells produce keratin which makes them more resistant to abrasion A thick layer of stratified squamous cells is visible here making up a large part of the superficial pinker layer The most superficial layers of cells may be separated from the main body of the tissue blockthis is an artifact of the tissue preparation With repeated friction the top layers of squamous cells wear off and thus the epithelial layer is constantly regenerating from below deep Note the deep invaginations of epidermis pinker tissue into the dermis paler tissue This helps anchor the epidermis to the dermis ayer of skin between the epidermis with which it
More Less

Related notes for BIOC33H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.