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By Hillary Goins Zoology 8 th Period

Mammals. By Hillary Goins Zoology 8 th Period. What Does Hair Mean to Mammals?. Mammals have the ability to maintain a constant body temperature Because mammals are endothermic, they live in almost any environment on Earth

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By Hillary Goins Zoology 8 th Period

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  1. Mammals By Hillary Goins Zoology 8th Period

  2. What Does Hair Mean to Mammals? • Mammals have the ability to maintain a constant body temperature • Because mammals are endothermic, they live in almost any environment on Earth • Mammals are the only animals that have hair which is made from keratin • Hair keeps mammals warm by retaining body heat • Sometimes mammals get too hot so they pant and sweat to cool off • Hair is also used for protection, camouflaging, and communication

  3. How Do Mammals Nurse Their Young? • Mammals feed their young by mammary glands which supplies milk that contains minerals, vitamins, sugars, and proteins • Besides mammary glands, mammals also include sweat glands, saliva glands, digestive enzymes, and hormones • Mammals nurse their young until they are old enough to find food themselves. This time length is different among species.

  4. Why Do Mammals Need a High Level of Energy? • Mammals need energy when they cool and heat their bodies • They also use energy to move • Mammals keep a high level of energy when large amounts of oxygen enters its body and reaches all the cells • The diaphragm helps accomplish this task by expanding and contracting the chest cavity • Mammals have a four-chambered heart which separates the oxygenated blood from the deoxygenated blood

  5. Why Do Mammals Have Different Types of Teeth? • Different mammals have different teeth depending on their diets • Pointed incisors are used to hold small animals and chisel-like incisors are for gnawing • Canines puncture and tear • Premolars and molars slice, shear, crush, and grind • Hoofed mammals usually eat plants; therefore, they have an adaptation called cud chewing which enables them to break down the cellulose of plant cell walls into nutrients

  6. What Are Modified Limbs? • Modified limbs are arms and legs that are for gathering food • Examples: Primates have an opposable thumb for grasping objects such as fruit and other foods; bats have finger bones that support the flight membranes • These modified limbs also help[ mammals capture prey and keeps them from becoming prey

  7. Mammals Can Learn??? • Mammals guard their young and teach them skills to survive on their on • Mammals are able to learn and remember • Primates and humans are the most intelligent mammals. • Because of complex nervous systems and developed brains, mammals are intelligent • Chimpanzees make tools to use to make life easier

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