Mammals Is an elephant a mammal? Why or why not?

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Presentation transcript:

Mammals

Is an elephant a mammal? Why or why not?

Is a squirrel a mammal? A bat?

What about these two?

Are whales and dolphins mammals?

Which of these animals are mammals? Nope YUP! Nope YUP!

What do all mammals have in common? Mammals have fur or hair.

Mammals nurse their young with mammary glands.

What is a gland? Mammals have organs called glands that secrete various substances needed by the animal. A gland secretes substances inside OR outside the body. Mammals have glands that produce milk, sweat, saliva, digestive enzymes, and hormones.

Mammals have a diaphragm. A diaphragm is a sheet of muscle located under the lungs that expands and contracts the chest cavity. It helps mammals take in large amounts of oxygen. The oxygen is used to make ATP during cellular respiration.

Mammals have different types of teeth.

Hairy, toothy alpacas are mammals. They make me laugh. Hey baby

Mammals have modified limbs Mammal limbs are adapted for a wide variety of uses - food gathering, swimming, flying, climbing, walking, etc. Primates have an “opposable thumb” to grasp objects.

Mammals can learn Mammals guard their young fiercely and teach them survival skills. The ability to learn and remember these skills helps mammals survive. Primates are so intelligent that they can use tools, machines, and sign language to communicate with humans. Mammals have complex nervous systems and highly developed brains.

Koko & All-Ball

Diversity of Mammals There are three subclasses within Class Mammalia: Placental mammals carry their young inside the uterus until development is almost complete. Marsupials (pouched mammals) have a short period of development within the mother’s uterus and a second period of development within the mother’s pouch. Monotremes (egg-laying mammals) have hair and mammary glands but they reproduce by laying eggs.

What is a placenta? The placenta allows nutrients to travel from the mother's system to the embryo's, and for waste products to leave the embryo's system so they can be disposed of by the mother’s. The placenta is the organ from which this group of mammals takes its name, it is the main reason the placental mammals are so much more successful than other mammals.

Examples of Placental Mammals Anteater Raccoon Bear Buffalo Manatee Dogs and Cats

Examples of Marsupials (pouched mammals) Wombat Kangaroo and joey Opossum Koala and baby

Examples of Monotremes (egg-laying mammals) Duck-billed Platypus Echidna

THE END