What are the components of the transport system in human beings? What are the functions of these components?
The components of the transport system in human beings are the heart, blood, and blood vessels.
The heart is the pumping organ that pushes blood around the body.
Blood transports food, oxygen, carbon dioxide, and nitrogenous wastes. It consists of a fluid medium called plasma in which cells are suspended. Plasma transports food, carbon dioxide and nitrogenous wastes in dissolved form, while oxygen is carried by the red blood corpuscles.
Blood vessels form a network of tubes that reach all the tissues of the body.
Explanation
The answer is derived directly from the textbook context. The circulatory system is explicitly stated to consist of 'the heart, blood and blood vessels.' The functions are clearly described: the heart as 'a pumping organ to push blood around the body,' blood as transporting 'food, oxygen and waste materials,' and blood vessels as 'a network of tubes to reach all the tissues.'