Cards in this guide (13)
What nervous system initiates internal secretion contraction and absorption
autonomic
peace.love.faith
Only two species of this mammal exist
Which two features of a bird help make it light enough to fly
hollow bones and air sacs :)
(A+ USERS)
The system is responsible for body locomotion
What feathers are located underneath contour feathers
The majority of feathers on a bird's body are feathers
The main functions of feathers are
Filoplumes are also known as feathers
Nitrogen is a necessary ingredient of what
Nitrogen is a necessary ingredient of ____.
What is the central cylinder of a feather
This structure branches off from the rachis and is similar to branches in a tree
Do all birds have feet that end in claws
This part of the feather is embedded in the skin of the bird