Mammals

1
Mammals
Mandy Wood
2
Animal Classes

• There are six major classes of animals fish,
  amphibians, reptiles, birds, insects, and
  mammals.
• We will learn about mammals and how they are
  different from the other types of animals.

Amphibians
Fish
Reptiles
Mammals
Birds
Insects
3
Facts about Mammals

• There are about 4,000 types of mammals. But, this
  is a small class since there are over 20,000
  types of fish and over 800,000 types of insects!
• Humans are mammals!

4
Traits Common to All Mammals

• They are warm-blooded.
• They have fur or hair.
• Mammal babies drink milk from their mothers.
• Mammals are vertebrates this means they have
  backbones or spines.

5
Warm-BloodedWhat does it mean?

• Warm-blooded means that mammals maintain a
  relatively constant and warm body temperature. A
  mammals body temperature isnt affected by
  outside temperatures.
• On the other hand, animals like reptiles are
  cold-blooded. The body temperature of
  cold-blooded animals changes with the
  environment.

6
Hair

• All mammals have hair on their bodies. Bears,
  horses, and bats are clearly covered with fur.
  Even marine mammals (those that live in water),
  have hair, but you would need a microscope to see
  it.

7
Mammals Drink Milk

• Baby mammals are born in different ways, but they
  all drink milk from their mothers.
• Mammal mothers have special milk-producing glands
  called mammary glands. Only mammals have these!
• Unlike fish or other animals, the babies depend
  on their mothers after they are born.

8
Mammals are Vertebrates

• What are vertebrates?
• Vertebrates are animals with a spinal cord
  encased in a vertebrae or a backbone.

9
Other Characteristics Common Only to Mammals

• Jaw bones Mammals have a single bone on either
  side, but other animals have more than one bone.
• Ears Mammals have three bones in their middle
  ear.
• Hearts The artery leaving our heart curves
  differently than any other animals heart.
• Diaphragms Mammals have a special sheet of
  muscles and tendons called a diaphragm. It
  separates the inside of the body into two parts.

10
Classifying Mammals

• Mammals are classified by the way they are born.
  There are three main types.

Monotremes
Marsupials
Placental Mammals
11
Monotremes

• They lay eggs! Thats right mammals can lay
  eggs!
• Common types of monotremes are the duck-billed
  platypus and echidnas.

12
Marsupials

• Marsupials are mammals whose young are born very
  underdeveloped. Mother marsupials often have
  pouches. Their babies crawl into the pouches and
  drink their mothers milk.
• Kangaroos, opossums, Tasmanian devils, and koalas
  are common types.

13
Placental Mammals

• Placental mammals are mammals whose young are
  born at a more advanced stage. Before birth, the
  young are fed through a placenta. The placenta is
  a special organ that delivers oxygen and
  nutrients to the young, growing baby.
• Common types humans, rodents, elephants, and
  whales

14
Summary

• Mammals
• 1) Are warm-blooded
• 2) Have hair
• 3) Drink milk from their mothers
• 4) Have backbones
• There are three types marsupials, monotremes,
  and placental mammals.
• Humans, dolphins, dogs, bats, and koalas are all
  mammals!

15
Assessment

• Now, lets see how much we know about mammals!
  Click the link below, and it will direct you to a
  document that will test your new knowledge!
• Is it a Mammal?
• For more mammal fun, visit these interesting
  facts pages!
• Mammal Facts Page
• Mammal Safari