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MAMMAL CHARACTERISTICS

MAMMAL CHARACTERISTICS. BY: ARIANA MEJIA. What is a Mammal?. Mammals are endotherms Able to live in almost every possible environment on earth. Ex: polar bears of the artic, tigers in tropical jungles, and dolphins that roam the atlantic ocean. Mammals have hair. Only mammals have hair

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MAMMAL CHARACTERISTICS

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  1. MAMMAL CHARACTERISTICS BY: ARIANA MEJIA

  2. What is a Mammal? • Mammals are endotherms • Able to live in almost every possible environment on earth. • Ex: polar bears of the artic, tigers in tropical jungles, and dolphins that roam the atlantic ocean.

  3. Mammals have hair • Only mammals have hair • Hair made out of keratin • Thought to have evolved from scales • Hair provides insulation, waterproofing and keeps in body heat. • Mammals cool off by sweating • Sweating releases water from lungs • Sweat glands regulate body temp by sweating • Hair can serve as protection(porcupine), camouflage, or can signal danger to other members of their herd. (pronghorn tail)

  4. Mammals nurse their young • Mammals have several kinds of glands that produce saliva, sweat, digestive enzymes, and hormones • Mammals feed their young from mammary glands • A mammary gland secretes milk • Mammals nurse their young until they are mature enough to find food

  5. Respiration and Circulation • Mammals need a high level of energy for heating and cooling their bodies • Energy level is sustained when large amounts of oxygen enter the body and reach all of the cells. • Mammals accomplish this by using a diaphragm • A diaphragm is the sheet of muscle that is located beneath the lungs. • It separates the chest cavity from the abdominal cavity • Mammals have four chambered hearts • Oxygenated blood is separated from deoxygenated blood.

  6. Mammals have different types of teeth • Mammals have different kinds of teeth • It depends on what type of food they eat • The pointed incisors of moles grasp and hold small prey • Chisel like incisors of beavers are for gnawing • A lion’s teeth puncture and tear the flesh of its prey. • Premolars and molars are used for slicing, crushing, and grinding.

  7. Mammal limbs are for a variety of methods of food gathering • Primates use their thumbs to grasp objects • In moles, the front limbs are powerful and short, with large claws • Bats have elongated finger bones that support the flight membranes • Limbs help animals get food and help them not become food for other animals Mammals have modified limbs

  8. Mammals can learn • One reason why mammals are successful is because they guard their young and teach their young survival skills. • Mammals accomplish complex behaviors, such as learning and remembering what they learned. • Primates are the most intelligent animals • Chimpanzees can use tools, machines, and sign language to communicate with humans • Mammals have complex nervous systems and highly developed brains.

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