Step-by-step explanation:
The heart and the circulatory system in a human are closely related but serve different functions:
1. Heart:
- The heart is a muscular organ responsible for pumping blood throughout the body.
- It is a vital part of the circulatory system and acts as the pump that propels blood through a network of blood vessels.
- The heart has four chambers: two atria and two ventricles, which work together to receive and pump oxygenated blood to the body's tissues and return deoxygenated blood to the lungs for oxygenation.
- The heart's primary function is to maintain blood circulation and ensure that oxygen and nutrients are delivered to the body's cells and that waste products are removed.
2. Circulatory System:
- The circulatory system is the body's transportation system for blood, which carries oxygen, nutrients, hormones, and waste products throughout the body.
- It includes the heart, blood vessels (arteries, veins, and capillaries), and blood itself.
- Arteries carry oxygenated blood away from the heart to the body's tissues, while veins return deoxygenated blood back to the heart.
- The circulatory system also includes the lymphatic system, which helps maintain fluid balance and defend against infections.