"Diffusion is the movement of molecules from an area of higher concentration to one of lower" is the one among the following choices given in the question that <span>best describes the process of diffusion. The correct option among all the options that are given in the question is the fourth option or the last option.</span>
Answer:
The exchange of substances between the blood vessels and the surrounding tissues can only happen in the <u>capillaries</u>.
Explanation:
Capillaries are the exchange vessels of our body. They form a network-like structure, called the capillary area. When blood, from the larger arterioles, spreads through the many capillaries in the capillary area, the blood pressure drops and the blood flows only at a slow speed. Through the thin, semi-permeable walls of the capillaries, the exchange of gas and substances between the blood and the surrounding tissue then takes place. Subsequently, blood continues to flow through the postcapillary venules, to which the capillary area has been reconnected. Blood pressure and blood flow increase and blood eventually reaches the heart through enlarged veins.
They are difficult to work with... most ppl don’t want to cook
A because a fossil is made of sediment and it takes a long time to make it.
