Mammalian Features

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Hair

turns into keratin

Vibrissae

whiskers

Horn (not true)

hair-like filaments cemented together

True Horn

Bone core surrounded by hair filaments

Antler

Solid bone

Milk

Nourish young

Ear bones

malleus, incus, stapes. Derived from jaw

Endothermic

Maintain body temp. different from environment

Types of Glands

Eccrine, Apocrine, Sebaceous, Mammary Glands.

Eccrine Gland

Evaporative Cooling

Apocrine Gland

Scent producing. Many functions.

Sebaceous Gland

Sebum. pliable, glossy hair

Mammary Glands

nourishment (water, carbs, fat, protein, minerals, antibodies).

Plantigrade

Whole foot

Digitigrade

Digits

Ungulatigrade

Tips of toes

Difference between Placental and Marsupial Mammals

Development of Young, Epipubic bones, egnostrated palate, marsupial shelf.

homeodont teeth

No diversity.

Heterodont

Diversity in tooth form and function

Diastema

Gap between incisors and premolars. Herbivore.

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