Lab 2: Integument

Question 1

Explain the three major axes?

Answer 1

rostral to caudal= nose to tail
Dorsal to ventral= back to belly
Medial-lateral= middle to outside

Question 2

Explain the three planes?

Answer 2

horizontal
cornal plane= cut through that eyes are one side and back of head the other
sagittal plane= cut down the nose

Question 3

Integument=

Answer 3

skin

Question 4

What are the two secretory cells?

Answer 4

mucoid-produces muscus
proteinaceous=produces slime or poison

Question 5

Three layers of integument?
Functions?

Answer 5

epidermis, dermis, hypodermis
protection, barrier, sensory functions, regulator

Question 6

Epidermis
-what layer
-top layer of epidermis is called?
-what is in epidermis?
-what is the bottom layer of epidermis?

Answer 6

Episdermis is the surface layer of integument
-stratum corneum outermost layer
-Keratins found inside
-a-kertin:hair, nails, horns
-b-keratin- feather, scales, claws, beaks
stratum germinativum-deepest layer and main site of cell division

Question 7

Horn vs Antlers

Answer 7

Horns dont fall off and are covered by keratin
Antlers shed every year and is made entirely of bone, is an extension of the skull

Question 8

Dermis
-meshwork of ___:—-
-top layer?
-Thickest main layer?
Contains?
What’s beneath?

Answer 8

fibers:collagenous and elastic
stratum spongiosum
stratum compactum
-mechanoreceptos, nerves, blood vessels
hypodermis(connective and adipose tissue)

Question 9

What are the unique components of the integument found in each of the different major groups?

Answer 9

Fish=produce mucus for smooth swimming
amphibans=have poisionus glands
Reptiles=epidermus is overlapping scales called scutes
Birds=feathers from epidermis
mammals=sweat glands