Regulation of water content
Removal of excess salts
Killing of bacteria
Regulation of body heat
D. Regulation of body heat
epidermis
dermis
subdermal tissue
whole of the skin
the removal of excess water
excreting excess salts
excreting nitrogenous wastes
cooling
placoid
rhomboid
cycloid
ctenoid
sweat glands
mucous glands
sebaceous glands
meibomian glands
epidermal
mesodermal
dermal
endodermal
stratum granulosum
stratum comeum
dermis
malpighian layer
mucous glands
sebaceous glands
hairs
nails
sweat gland
sebaceous gland
mammary gland
gastric gland
gradual loss of elasticity in the subcutaneous layer
gradual loss of adipose tissue below dermis
poor supply of blood to skin
excess loss of water from skin
epidermis
dermis
subcutaneous layer
skin glands
Lacrimal glands
Meibomian glands
Sudorific glands
Cowper's glands
stratum comeum
stratum spongiosum
stratum compactum
any of these
palm
sole
head
thumb
tips of pinnae
area around the lips
soles of the paw
all of these
eyes of mammals
olfactory passage of mammals
external auditory meatus in mammals
none of these
in the epidermis
in the dermis
in the muscles
below the derm
root
follicle
papilla
bulb
scales
epidermis I
mucous glands
chromatophores
possessing stratum comeum for protection against wear and tear
not possessing subcutaneous fat
possessing mucous glands for producing mucus.
possessing sebaceous glands which produce sebum for keeping skin greasy and water-proof.
cuticle
keratin
chitin
none of these
sebaceous glands
sweat glands
mucous glands
sudorific gland
plug the skin pores
nourish the hair follicles
cool the skin by vaporisation
make the skin and hair water proof
hormones
water and salt
oil
sebum
epidermis of skin of mammals
dermis of skin of mammals
epithelium of stomach of frog
epithelium of intestine of frog
melanin
melanophores
porphyrin
chromatophores
air spaces for respiration
blood spaces
lymph spaces
mucus filled spaces
mucus
tears
hormones
enzymes
water and fat
proteins
carbohydrates
all of these
subcutaneous layer
epidermis
glands
stratum corneum
Regulation of water content
Removal of excess salts
Killing of bacteria
Regulation of body heat