1. Atrium
2. Ventricle
3.left ventricle
4. they pump blood throughout the body
5.superior vena cava
6. Pulmonary vein
7.Four heart valves control the flow of blood through the heart. They act as one-way doors, opening to let blood exit or enter a chamber, then closing to keep blood from flowing backward.
A. Carbon
Explanation:
because during photosynthesis, the cells use carbon dioxide and the light from the sun and that makes sugar molecules.
The most appropriate unit for describing a 26 mile marathon run would be C. Kilometre. As kilometres can be easily utilized and converted to miles and vice-versa.
<h2>respiracion aerobic</h2><h2>fotosintesis</h2>
organismo Eucaronte
<h2>pluricelular</h2><h2>reproduciion </h2><h2 /><h2 />
2009 is the year that the population of zebras and lions is the highest
