Skin Structure And Function

Question 1

The sebaceous glands of sheep produce ___

Answer 1

Lanolin

Question 2

I’m other species the product produced is called___which functions to keep the hair soft, pliant and somewhat waterproof

Answer 2

Sebum

Question 3

The secretions of sebaceous glands can clog the hair follicle opening and over time turn black and become a

Answer 3

Comedone

Question 4

Where is the location of the three primary cutaneous pouches found in sheep?

Answer 4

Cutaneous pouches in sheep are unfolding of skin that contain fine hairs, sebaceous and oil glands. They cbs be found infraorbital, interdigital and inguinally.

Question 5

Describe the structure and function of vibrissae

Answer 5

(Whiskers) Prominent sinus hairs, found on nearly all mammals that act as specialized sensory organs for touch

Question 6

Sebaceous glands

Answer 6

Found all over the body except paw pads and nasal planum. Located in the dermis. Empty into hair follicles or the skin surface at mucocutaneous junctions of the lips, labia vulgar, penis, prepuce, anus eyelid and ear canal. Sheep they empty directly on skin surface of cutaneous pouches. Contain sebum (lanolin in sheep). Keeps hair moist some antibacterial/anti fungal properties. Clogged hair follicles produce whiteheads and comedones (blackheads)

Question 7

Sudoriferous Glands

Answer 7

Found over entire body of most domestic species including pigs, horses, cattle, dogs and sheep. Only horses produce profuse sweat, a thin, transparent, watery liquid that helps cool the body through evaporation

Question 8

Eccrine glands

Answer 8

Coiled tube in the dermis or hypodermis that connects to the skin surface by a long duct. In dogs they are only in the deep fat layers and footpads

Question 9

Apocrine glands

Answer 9

Coiled excretory portion in the dermis or hypodermis with a single excretory duct. Empty into hair follicle not skin surface, in dogs in the external ear canal

Question 10

Tail

Answer 10

Found in most dogs and cats at dorsal base of tail. Thought to assist in identification. Large sebaceous and apocrine glands. May look greasy especially during estrus and puberty

Question 11

Anal sac

Answer 11

Musk glands found in skunks, dogs and cats. Located and 5 and 7 o’ clock relative to anus with single duct that empties at 3 and 9 o’ clock. Attract mate and identification purposes. Empty at defecation or fear.