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Defend Earth from alien invaders
endothermy, hair, completely divided heart, milk, single jawbone, specialized teeth
six characteristics all mammals possess
why meat is easier to digest
plants have cellulose, animals do not have enzymes that breakdown cellulose
how herbivores can digest plants
have long digestive tracts of herbivores contain microorganisms that can produce enzymes capable of breaking down cellulose
4 chambered stomach
contains microorganisms to break down cellulose, material is partially digested and then regurgitated, chewed and swallowed again
an area where food from the rumen can pass back and forth and it helps aid in digestion
water and minerals are absorbed into the blood
identical to the stomach in monogastric animals
sac branching from the small intestine that serves as a fermentation chamber; horses and zebras have them
vision, hearing, smell, touch and taste
major animal senses
lays one or two large eggs, encased in a thin leathery shelland then incubates the eggs; hatched small and partially developed ; The mother protects her young, feeding it with milk until it is ready to survive on its own
Embryos develop for a short period within the mother's uterus; They then emerge from the uterus and crawl into a skin-lined pocked on the mother's abdomen called a pouch; Within the pouch the newborn attaches to a nipple and feeds on milk as it continues to grow and develop within the pouch for several more months
a skin-lined pocked on the mother's abdomen, in marsupials
Give birth to well-developed young after a long period of development within the uterus; During this period of growth, provides nourishment and oxygen to the developing offspring
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