The in tegumentar y system:
This system is composed of the skin and its glands (swe at glands & sebaceous glands), hair, and n ails. •
This system provides us w ith clues about one’s hea lth deepe r disorders. Such as live r, cancer, anemia, kidney •
dise ase, and hea rt failure .
The sk in is the larges t organ in the bod y. •
It is a b arrier t o the o utside world. •
Visual indicator of o ur phys iology and health. •
Ski n is classifie d as thick (hairless skin) and thin (hairy skin ) depe nding on the thickne ss of t he epidermis alone:
Thick skin:
The pa lm of th e hands and the soles of feet, and su rfaces of the fingers and toe s all h ave thick skin. •
it does not have hair follicle s or sebaceous gla nds. •
it has all 5 layers of epide rmal strata . •
It has swe at glands. •
Thin skin:
Covers most of the body •
it lacks s tratum lucidum. •
It has swe at glands, hair follicles, and se bace ous glands. •
Func tions of the skin:
Resistance to trauma and infe ction. •
Water re tention •
Vit amin D synthes is •
Sensat ion •
Thermoregulation •
Nonverbal communic ation •
Major compone nts o f the integumen tar y system:
Cutane ous membrane: ep idermis & dermis. 1.
Subcutaneous : hypodermis . 2.
Access ory structure: hair follicle s, sebaceous and swe at glands, and 3.
sensor y cells (embe dded in t he dermis and pas sing through the
epidermis).
superficial
peep
