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.
Answer:
the RRRGENTS
Explanation: The human body does Regulation, Excretion and Synthesis
The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container.
Explanation:
<span>The hypothalamus in the brain plays a primary role in regulating body temperature. When a person is exposed to a cold environment, the hypothalamus senses such a change, causing the body to undergo changes that conserve heat (blood vessels constrict, muscle cells contract involuntarily, a process referred to as shivering). Conversely, when one is exposes to excess heat, the hypothalamus also senses such an environmental change, and triggers physiological processes such as sweating and the dilation of blood vessels.</span>
