Components of the Circulatory System: Blood, Blood Vessels, and Heart
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Components of the Circulatory System
The circulatory system consists of various components that work together to transport blood throughout the body. These components include:
Blood
- Plasma: a liquid substance that carries nutrients and waste throughout the body.
- Red blood cells: responsible for carrying oxygen and giving blood its red color.
- White blood cells: protect the body from germs and diseases.
- Platelets: help stop bleeding from wounds.
Blood Vessels
- Arteries: carry blood from the heart to the capillaries.
- Veins: carry blood from the capillaries back to the heart.
- Capillaries: enter body cells to deliver nutrients and oxygen, and remove carbon dioxide and waste.
Heart
The heart is a muscular organ that pumps blood throughout the body via the blood vessels. It consists of:
- Atria: where blood enters the heart.
- Ventricles: where blood leaves the heart.