Animals take in oxygen and release it as Carbon dioxide
D) dilating sureface blood vessels
When you're out in cold weather, your skin triggers shivering so the blood vessels will contract and keep you as warm as possible. But if there's a heat wave, you'll sweat to increase the blood flow to the capillaries, which in turn increases sweating. This process cools you off as the water evaporates from your skin.
If the amount of leaves on a tree decreases, the number of bird nest will decrease, because birds build their nest on leaves of a tree....Am ebube Slt
Multicellular, eukaryotic, heterotrophic
