The human transport system, also known as them, also known as the circulatory system, is composed of the heart, blood, and blood vessels. The heart is a muscular pump that circulates blood, while blood acts as the fluid medium transporting essential substances. Blood vessels, including arteries, veins, and capillaries, facilitate blood circulation and material exchange between blood and body tissues.
Components and Their Functions:
1. Heart:
The heart is the central organ of the circulatory system, responsible for pumping blood throughout the body. It receives deoxygenated blood from the body, pumps it to the lungs for oxygenation, and then pumps the oxygenated blood to the rest of the body.
2. Blood:
Blood is a fluid connective tissue that carries various substances, including oxygen, nutrients, carbon dioxide, and waste products. It consists of plasma, red blood cells (RBCs), white blood cells (WBCs), and platelets. RBCs transport oxygen, WBCs protect against infection, and platelets help in blood clotting.
3. Blood Vessels:
Blood vessels are a network of tubes that carry blood throughout the body.
Arteries: Carry oxygenated blood away from the heart to various organs.
Veins: Carry deoxygenated blood back to the heart from different body parts.
Capillaries: These tiny vessels facilitate the exchange of oxygen, nutrients, carbon dioxide, and waste products between the blood and body tissues.