Structure and function-there are only TWO types of cells-prokaryotic and eukaryotic
The atria are chambers<span> in which </span>blood<span> enters the heart. They are located on the anterior end of the heart, with one atrium on each side. The right atrium </span>receives <span>deoxygenated </span>blood<span> from systemic circulation through the </span>superior vena cava<span> and</span>inferior venae cavae<span>.</span>
Answer:
Muscles are involved in the digestive system, immune system, and excretory system.
