A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in thumb. to travel from the artery in the arm to the left ventricle, this red blood cell must pass through:_________.
a. one capillary beds
b. two capillary beds
c. three capillary beds
d. four capillary beds
e. five capillary beds

Our body contains miles of arteries and arterioles, yet these structures are nothing more than the vascular highways that provide a pathway for the blood. It's only when our blood reaches the tiny capillaries that nutrients and wastes can be exchanged. Capillaries are microscopic blood vessels that connect the arterioles with the venules. We'll discuss venules later in the lesson.
Capillaries are grouped together in capillary beds, which are simply a network of capillaries. Capillary beds are too small to see, but if you could see them, they would look like endless alleyways leading to virtually every tissue in our body. The rate of blood flow within a capillary bed is slow because there are so many different alleyways through which blood can travel. This slow speed limit, along with the very thin walls of the capillaries, means that capillary beds are an ideal place for the exchange of gases, nutrients, hormones, and wastes between the blood and tissue cells.
Hence, the right answer is option b "two capillary beds".

kasliwalalvi24 kasliwalalvi24 · Answer 2 · 2021-12-02T13:11:47+01:00

The human circulatory system primarily comprises blood vessels, the heart, lungs, and capillary beds. The capillary beds refer to the network of capillaries.

The red blood cell travels through an artery in the arm to the left ventricle, the red blood cell will pass through two capillary beds.

Arteries are the type of blood vessels that delivers oxygen-rich blood to different parts of the body. The arteries when brach into small diameter vessels are termed arterioles.

Similarly, venules and arterioles when exchanging blood and nutrients form a capillary bed.

Capillary beds perform the exchange of blood and nutrients at the cellular level.

The red blood cell carrying the oxygen will deliver the oxygen to the thumb, and in return, the thumb will provide waste material and deoxygenated blood.

Thus, it will lead the red blood cell to pass through two capillary beds.

Therefore, the correct answer is option B.

To know more about capillary beds, refer to the following link:

https://brainly.com/question/12533346