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

(N/A) The main components of the transport system in human beings are the heart, blood, and blood vessels.
$1$. $Heart$: It acts as a pumping organ that circulates oxygenated blood to all parts of the body and collects deoxygenated blood to send it to the lungs for oxygenation.
$2$. $Blood$: As a fluid connective tissue, it transports oxygen, nutrients, $CO_2$, and nitrogenous waste products throughout the body.
$3$. $Blood$ $vessels$: These include arteries, veins, and capillaries. They form a network of tubes that carry blood away from the heart to the tissues and return it back to the heart.