Structure & function of skin

Question 1

Dermis

Answer 1

thick, highly vascularized
composed of collagen & dense irregular CT
blood vessels, lymphatics, nerve endings, sebaceous & sweat glands

papillary - binds epidermis & dermis, light touch (Meissner’s corpuscles), circulation/drainage (blood/lymph vessels), heat/pain (free nerve endings

reticular - provides strength & resilience (collagen, elastin, reticular fibers), hair follicles

Question 2

Subcutaneous tissue

Answer 2

superficial fascia
loose CT & fat
insulation, support & cushion for skin; stores energy
detects pressure (pacinian cells)
detects cold (free nerve endings)

Question 3

Epidermis

Answer 3

thin, avascular, keratin
tough outer layer protection
produces melanin to prevent UV absorption
Detect touch (Merkel’s cells)