What are the components of the transport system in human beings? What are the functions of these components?

The essential elements of the human body\’s transport system are the heart, blood, and blood vessels.

The roles played by these components

Heart
Blood with oxygen is circulated throughout the body by the heart. It collects blood that has lost oxygen from various body parts and transfers impure blood to the lungs where it is oxygenated.
Blood
Oxygen, nutrients, CO₂, and nitrogenous wastes are all transported by blood.
vascular system
Blood is transported throughout the body by blood vessels, arteries, and veins.