1. Animals 4-1
Bird- endothermic, vertebrate, that has feathers, a four-chambered heart, lays eggs, and has scales on their legs and feet.
Notes
Birds bodies are adapted for flight in 4 ways
1 forelimbs form wings
2 bones are nearly hollow (light weight)
3 large chest muscles to move the wings
4 feathers
IF IT HAS FEATHERS IT’S A BIRD

2. Animals 4-1
Contour feathers –large feathers that give shape to a bird’s body. Longer contour feathers that extend past the body on the tails and wings are called flight feathers
Down feathers- short fluffy feathers that are specialized to trap heat and keep the bird warm

3. Animals 4-1
Insulator- a material that does not conduct heat well and therefore helps keep it from escaping
Crop- internal organ used for storage of food, connected to the stomach
Gizzard- muscular part of the stomach often contains small pebbles to help grind down partially digested food

4. Animals 4-3 Mammals (YOU)
Endothermic, vertebrates, 4 chambered heart, skin “covered” with fur or hair, produce milk to feed young, have teeth of different shape
MOST give birth to live young
Fur and hair- some mammals have only a few strands some have 150,000 hairs per sq cm.
Hair/fur along with fat help mammals regulate heat
Teeth-mammals need lots of energy specialized teeth are adapted to chew food

5. Animals 4-3 Types of teeth
Incisors- flat-edged teeth used to bite off and cut parts of food
Canines- sharply pointed teeth that stab food and tear into it
Premolars and molars- grind and shred food
Breathing and Blood
Diaphragm- large muscle located at the bottom of the chest aids in breathing
Heart basically the same 4 chambered 2 loop system found in birds

6. Animals 4-3
Highly developed brains that can learn well developed senses
Many complex movement most varied
Reproduction and caring for young
Almost all give birth to live young who feed on milk produced by the mother
Mammary gland – produces milk for young mammals the term mammal comes from mammary

7. Animals 4-4 Mammal Groups Monotremes Marsupials Placental
Monotremes- mammals that lay eggs
ex. duck billed platypus, spiny anteater
Marsupials- young are born alive, at an early stage move to a pouch on the mother for more development
Gestation Period- time between fertilization and birth

8. Animals 4-4
Placental Animals- young develop inside its mother until its body systems can function independently
Placenta- an organ in a pregnant female mammal that passes materials between the mother and embryo. Food/oxygen in and waste out. Connected by umbilical cord
Placental mammals grouped on how they move, eat, where they live