Bird Functions
This bird structure stores food before digestion begins.
crop
This force pushes a bird upward into the air.
lift
Mammals have different types of teeth for this main purpose.
eating
These organs produce milk for feeding young.
mammary glands
Both birds and mammals are this type of animal that maintains body temperature.
endotherms or warm-blooded
This muscular organ helps grind food in birds.
gizzard
Lift is created when air moves faster over this part of the wing.
top
Mammals breathe using these organs.
lungs
This is the length of time a baby develops inside the mother.
gestation period
Both groups have this type of heart.
4-chambered heart
These feathers give birds their shape and smooth outer covering.
contour feathers
Birds need large amounts of energy mainly for these two things.
flight and body heat
This muscle helps mammals move air in and out of the lungs.
diaphragm
This structure provides nutrients and oxygen to a developing baby.
placenta
Birds help the environment by doing these two things for plants.
pollination and spreading seeds
These soft feathers help birds stay warm by trapping heat.
down feathers
What kind of air help birds gain height without flapping.
warm
This body covering helps mammals regulate their temperature.
hair or fur
This type of mammal gives birth to underdeveloped young that grow in a pouch.
marsupial
This is the key difference in development between marsupials and placental mammals.
marsupials develop in a pouch while placental mammals develop inside the mother
Name an adaptation, other than hollow bones, that helps a bird fly.
This structural feature makes birds lighter and more efficient at flying.
hollow bones
This type of heart keeps oxygen-rich and oxygen-poor blood completely separate.
4 chambered heart
This group of mammals lays eggs instead of giving live birth.
monotremes
This system in mammals uses the diaphragm and lungs to bring oxygen into the body.
respiratory system