Birds Flashcards
(4 cards)
1
Q
Why is a 4 chambered heart better than any other heart?
A
It separates the oxygen rich blood and the oxygen poor blood
2
Q
Why do birds have hollow bones?
A
They need to be light weight to fly
3
Q
Characteristics of a bird
A
Backbone, special beak, feathers, 4 chambered heart
4
Q
What do birds have that help them carry more oxygen than any other?
A
Air sacs
