autumncook1130
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Which of the following must have thick flexible walls to withstand the strong blood pressure produced as the heart pumps out blood?
Arteries
Alveoli
Veins
Capillaries

Respuesta :

DrDan
I'll give you information on all of them so you can differentiate between the 4.

To answer your question Its Arteries.


Arteries


The walls (outer structure) of arteries contain smooth muscle fibre that contract and relax under the instructions of the sympathetic nervous system.

Functions:

Transport blood away from the heart;

Transport oxygenated blood only (except in the case of the pulmonary artery).


Alveoli - This doesn't relate to your question. (The alveoli are small air sacs in the lungs that allow for gas exchange to occur between the lungs and the bloodstream.

veins

The walls (outer structure) of veins consist of three layers of tissues that are thinner and less elastic than the corresponding layers of aerteries.

Veins include valves that aid the return of blood to the heart by preventing blood from flowing in the reverse direction.

Functions:

Transport blood towards the heart

Transport deoxygenated blood only (except in the case of the pulmonary vein)


Capillaries


Capillaries are tiny (extremely narrow) blood vessels, of approximately 5-20 micro-metres diameter. There are networks of capillaries in most of the organs and tissues of the body. These capillaries are supplied with blood by arterioles and drained by venules. Capillary walls are only one cell thick, which permits exchanges of material between the contents of the capillary and the surrounding tissue.

Functions:

Function is to supply tissues with components of, and carried by, the blood, and also to remove waste from the surrounding cells ... as opposed to simply moving the blood around the body.

Exchange of oxygen, carbon dioxide, water, salts, etc., between the blood and the surrounding body tissues.

Hope this helps

The circulatory system including the heart, arteries and vessels are responsible for the circulation and collection of oxygen-rich and deficient blood in the body organs.

Arteries have thick flexible walls.

What are different circulatory components?

  • The arteries have smooth muscle fibers that can relax and contract by the messages received from the sympathetic nervous system and transports blood away from the heart towards the body parts as they are rich in oxygen.

  • Alveoli are not the structural component of the heart but of the respiratory system. They are sac-like structures that allow the exchange of gases.

  • Veins are the thinner and less elastic structures of the circulatory system that brings oxygen-deficient blood from the body tissues towards the heart.

  • Capillaries are blood vessels that receive blood from arterioles and are drained by venules and permit the exchange of material between the blood and surrounding tissues.

Therefore, option a. arteries have thick walls.

Learn more about arteries and veins here:

https://brainly.com/question/1676104

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