Biology Year 9 Final Exam :- Blood
- Created by: EllieHeath121
- Created on: 30-06-16 17:42
Fullscreen
capillaries:
are very narrow
blood flows through them slowly to give time for gas exchange
only one cell thick
co2 passes into capillaries
arteries:
when the heart contracts, blood is forced into the arteries
each…
Comments
No comments have yet been made