Chapter 4 Birds and Mammals Crossword

a endothermic vertebrate that has feathers, four-chambered heart and lays eggs.
large feathers that gave shape to a birds body.
short, fluffy feathers that trap heat and keep birds warm.
an internal storage tank for storing food inside the body after swallowing it.
a thick walled, muscular part of the stomach
an upward force that cause the bird to rise.
are endothermic vertebrate that have a four chambered heart and skin covered with fur and hair.
organ in mother's body the produces milk to fed young mammals
a large muscle located at the bottom of the ribs cage that functions in breathing
egg-laying mammals
mammals whose young are born at an early stage of development, they continue to develop in their mother's pouch
develops inside its mother's body until its body systems can function independently.
on organ in pregnant female mammals that passes materials between the mother and the developing embryo.