The size of the capillary is smaller than the red blood cells. The exact reason for this is not known. The red blood cells get folded when they pass through the capillaries. This phenomena buy time for the blood to flow through the capillaries, probably. Secondly it will create larger surface area of total number of capillaries to flow the same amount of blood. You have better exchange of gases through larger surface area.
The respiratory and circulatory systems are involved in the exchange of gases between the alveoli and blood. The alveoli are part of the lungs, and their surrounding capillaries are part of the circulatory system.
The alveoli is the division of the respiratory system where gas exchange with the blood occurs. Oxygen from the inhaled air diffuses into the blood in the capillaries surrounding the alveoli, while carbon dioxide diffuses from the blood into the alveoli to be exhaled.
Blood gets oxygen from the air in the alveoli of the lungs, where oxygen diffuses across the thin walls of the alveoli and into the surrounding capillaries. This process is known as gas exchange.
Oxygen is exchanged from the air in the alveoli into the blood in the capillaries, while carbon dioxide is exchanged from the blood in the capillaries into the air in the alveoli during the process of respiration.
as it moves through blood vessels capillaries in the alveoli walls, your blood takes oxygen from the alveoli and gives off carbon dioxide to the alveoli
It diffuses into the blood capillaries surrounding the alveoli.
capillaries
It is very important that they cover you alveoli
In the capillaries surrounding the alveoli in the lungs
They are present in the lung surrounding the alveoli.
The alveoli provide large surface area for the exchange of gases between the blood and the air. Each alvoeli is surrounded by many capillaries(tiny blood vessels). The very thin walls and large surface area of the alveoli and numerous capillaries surrounding them enable gases to be exchanged quickly and efficiently. Oxygen in the inhaled air diffuses from the alveoli to the blood in the capillaries. The blook then carries the oxygen to the cells in the other parts of the body. The waste product of respiration, CO2 , diffuses from the blood to the lungs through the capillaries surrounding alveoli. It leaves the body through bronchi and trachea when you exhale( breathe out).
the blood surround Alveoli in order to gas exchange between the Alveoli and red blood cell.
The smallest blood vessels of the body = capillaries
In the alveoli
The humorus
Capillaries are the blood vessels that surround the alveoli, or air sacs, in your lungs. These capillaries are the site of gas exchange.
Blood capillaries are surrounded by a layer called the basement membrane, which provides structural support and acts as a barrier between the capillaries and surrounding tissues. Pericytes, contractile cells that regulate blood flow and vessel stability, may also be found surrounding blood capillaries.