The answer is A, diffusion
Most blood flows across to the left atrium through a shunt called the foramen ovale. then from the <span>left atrium, </span>blood<span> moves down into the lower chamber of the </span>heart. <span>It is then pumped into the first part of the large artery coming from the </span><span>heart</span>
Answer:
Double Helix
Explanation:
It is called the double helix for the signature shape that a DNA strand takes.
In an endothermic reaction, energy is absorbed which causes the object to heat up.
Answer:
Muscles contract rapidly to produce heat on a cold day.
Explanation:
