Skin Anatomy

Question 1

Name important functions of the skin

Answer 1

mechanical protection, body temp reguation, vitamin d synthesis, salt excretion, non-specific immunity, and tactile sensation

Question 2

What is the epidermis made out of

Answer 2

stratified keratinized squamous epithelium

Question 3

Name the layers of the epidermis deepest to most superficial

Answer 3

Stratum - basale (aka germinativum), spinosum (produces keratin), granulosum, lucidum (only found in thick skin), cand corneum,

Question 4

What does the epidermis contain

Answer 4

melanocytes (pigment-producing), langerhan’s cells (immune identification), Merkel cells (mechanorecptors), and free nerve endings (nociceptive and heat receptors)

Question 5

What are the layers of the dermis and their functions

Answer 5

papillary: made up of loose ct containing fibroblasts and collagen fibers (also contains Meissner’s corpuscles which are sensitive to pressure along with Krause corpuscles which are sensitive to cold)

reticular layer: lies deeper and is made up of mainly collagen and elastic fibers

Question 6

What is the deepest layer of skin

Answer 6

hypodermis (aka subcutaneous layer)

Question 7

What is contained within the subcutaneous layer

Answer 7

pacinian corpuscles - sensitive to vibration

ruffini corpuscles - sensitive to joint position sense

Question 8

Describe the two types of sweat glands

Answer 8

Eccrine: All over body, innervated by cholinergic nerves, produce water and salts, involved in thermoregulation

apocrine: found in axilla, mons pubis, and around the anus, innervated by adrenergic nerves, involved in body scent

Question 9

Describe sebaceous glands

Answer 9

Produce sebum
Found everywhere except thick skin in the palms and soles
abundant on scalp and face
Holocrine gland*