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Mammals. By: Morgan, Hailey, Madison, Madi,Kaite. Key Terms. Mammals- a group of vertebrates. Mammary Glands- were milk is stored. Diagram- large mussels. Monotreme- egg laying mammal. Marsupial- young who is born in early development.
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Mammals By: Morgan, Hailey, Madison, Madi,Kaite
Key Terms • Mammals- a group of vertebrates. • Mammary Glands- were milk is stored. • Diagram- large mussels. • Monotreme- egg laying mammal. • Marsupial- young who is born in early development. • Gestation Period- the length between fertilization and birth. • Placental mammal- develops insides mothers body. • Placenta- an organ in a pregnant female.
Common characteristics • All animals have fur they are all endothermic vertebrates. Most mammals are born and are fed by organs in the mother, known as mammary glands.
Internal conditions stable • All mammals are endotherms • The energy in there food keep their temperature stable. • There fur allows them to live in cold temperatures.
Reproduction • Mammal reproduce using sexual reproduction organs. • They mate to reproduce. • Gestation period is a period between birth and fertilization. • Some mammals called monotremes lay eggs. • Others called placental mammals develops inside its mothers body.
Circulatory system/oxygen • All mammals have a closed circulatory system. • Closed means inside veins • Open means sloshing around inside the body • Closed system makes blood flow through the veins. • Oxygen gets in the blood by entering the body using lungs then it goes through the circulatory system.
Movement • Most mammals walk on four limbs. Only humans walk on two legs. Aquatic mammals have flippers, fins for swimming rather than legs. • Some mammals can glide by flattening their stomach and stretching out their skin between their legs and feet.
Types of organisms • There are three main types of mammals. • Monotremes are egg laying mammals such as the spiny anteater and the platypus. • Marsupials are born in an immature stages, most have pouches such as the wombat, koala, and the kangaroo. • Placenta's young is born in an advanced stage. There is almost four thousand placental mammals such as the human, elephant, whale, dog, cat, and even the mouse.
Interesting Facts • A cat can run up to 12 miles per hour. • Cheetahs do not roar they purr like cats. • Mammals came to Earth about 200 million years ago.
Work Cited • Webs: Animalplanet.com • Animaldiversity.com • Motls.blogspot.com • Books: Life Science • E.Guides • National Geographic Mammal Book