ACB 406.3 Lecture Notes - Lecture 8: Stratum Spinosum, Lamellar Corpuscle, Hemidesmosome

• School: U of S
• Department: Anatomy and Cell Biology
• Course: ACB 406.3
• Professor: Helen Nichol

Document Summary

Covers both the lecture and lab, more focus on the lectures. Function: protection mechanical/ chemical/ water/ uv/ microorganism barrier, sensory, regulation of body temperature. Insulation: cooling sweat, control of peripheral blood circulation, synthesis of vitamin d, excretion of some toxicants, sexual attractant cues of general and reproductive health, true for all mammals. Terminology: skin = cutis = epidermis + dermis, subcutis = hypodermis. Integument = cutis + subcutis: when looking at slide, there(cid:859)s (cid:374)o li(cid:374)e dra(cid:449)(cid:374) (cid:271)et(cid:449)ee(cid:374) ea(cid:272)h seg(cid:373)e(cid:374)t. Just like epithelium, it is: avascular, rest on basement membrane, have a free surface, polarized, cells are linked by junctions. I(cid:374) ski(cid:374) of pa(cid:449)s, the (cid:374)e(cid:449)ly dead (cid:272)ells for(cid:373) a (cid:858)(cid:272)lear(cid:859) layer that does(cid:374)(cid:859)t stai(cid:374) well w/ h&e: stratum lucidum. Histologically refers to the thickness of the epidermis especially the stratum corneum. Thick skin = has a thick epidermis does(cid:374)(cid:859)t ha(cid:448)e a(cid:374)y hair folli(cid:272)les. Thin skin = thinner epidermis but dermis can be thick; usually hairy.