| A | B |
|---|
| Red blood cells | The location where nutrients and oxygen can be absorbed |
| Capillaries | The location where red blood cells can pass nutrients in and out into the bloodstream |
| Arteries | Where blood is moving away from the heart |
| Veins | Where blood is moving into the heart |
| Pulmonary | Moving into or out of the lungs |
| heart | The main organ of this system, this moves blood around to the lungs and/or the body |
| Vena cava | Where deoxygenated blood returns to the heart from the body |
| Aorta | Largest artery in the heart which takes oxygenated blood out to the body |
| Valves | These open and close during heartbeats to prevent blood from traveling backwards in the heart |
| Five liters | The average amount of blood in an adult body |
| Right side | The side of the heart where blood returns from the body |
| Left side | The side of the heart where oxygenated blood returns from the lungs |
