2 / 36 Mammal Anatomy and Physiology Options Flashcards
Standing with entire foot on the ground as in humans
Plantigrade
Standing up on the digits as in cats and dogs
Digitigrade
Standing on the tips of the toes on hoofs as in the ungulates
Unguligrade
The Mammalian Postures
Plantigrade, Digitigrade, Unguligrade
These are branched and are they shed every year
Antlers
These are not branched and are permanent
Horns
Composed of hair-like keratinized filaments
Rhinoceros Horns
Skin covered bone are found in giraffes
ossicones
They consist of a sheath of keratin over bone
Horns
Both sexes have them
Horns
Found in deer, elk, moose
Antlers
Usually found in males only
Antlers
Mature antlers are made of solid bone
Antlers
This is a key feature of the mammals
Hair
This is where hair grows up out of
Hair follicles
Hair is composed of a tough protein called
Keratin
The fur coat of mammals
Pelage
Protection against wear and for coloration
Guard hair
Hair is periodically molted (shed) in
Most mammals
Pelage consists of
underhair (underfur) for insulationPelage consists of
Special sensory hairs
Vibrissae (whiskers)
Pangolins have evolved these and they look like pinecones
Scales
Armadillos have
Horny plates
Mammals have skin glands that include sweat, scent, sebaceous, and mammary glands.
Glandular skin
Secrete the watery sweat that is used for evaporative cooling
Eccrine glands
Secrete a white or yellow sweat at puberty, limited to armpits, pubic areas, breasts, and a few other areas
Apocrine glands
Mammals use scent to attract the opposite sex, mark territories, communicate, warn others, and for defense (skunks)
Scent glands
Secrete a greasy substance called sebum - oils the skin and hair and keeps them pliable - has antibacterial properties - most are associated with hair follicles.
Sebaceous glands
Produce milk
Unique to mammals
Probably modified sweat glands
Mammary glands
Covers body surfaces or cavities
Epithelial tissue (epithelium)
Provides support for the body and connects all of its parts
Connective tissue
Contracts and moves the various parts of the body.
Muscular tissue
Consists of neurons and glial cells
Nervous tissue
Have many support and service functions
Glial cells
Organs are part of
organ systems like the nervous system or the digestive system.