Which chamber of the heart receives the deoxygenated blood from the systemic system first?

What is the importantence of the carbon and nitretan cycles in the environment

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?