what carries oxygen-rich blood?
humans elephants arterioles ducks mammals animals four limbs bears
A B C D E F G H
Arteries turn into smaller arteries called arterioles.
arterioles carry oxygen-rich blood
what carries oxygen-rich blood? (A) humans (B) elephants (C) arterioles (D) ducks (E) mammals (F) animals (G) four limbs (H) bears