Capillaries

A capillary has a very narrow lumn and very thin wall. These features maximize diffusion of nutrients, wastes, and oxygen.

Tunica Intima

The blood cells must move through the capillaries in a single file line because the diameter of the capillary is only slightly larger than the diameter of the blood cells - there isn't room for two blood cells to go through side by side.

nose - nasal cavity - larynx - trachea - primary bronchus - secondary bronchi - tertiary bronchi - terminal bronchi oles - respiratory bronchioles - alveoli - alveolar sacs

the alveolar sacs contain the pulmonary capillaries. the actual gas exchange occur here by simple diffusion. O2 goes from the lungs into the O2 depleted RBC.

oxygen has to pass through them to make blood rich

If their walls are too thick, substances like oxygen and nutrients and waste cannot pass across the cells into or out of the body.

The Capillary tube metering device is used primarily on small fractional-horsepower refrigeration systems that have relatively constant evaporator heat loads.

These systems are hermetically sealed, leak free systems with dry-type evaporators that use a minimum of refrigerant.

The capillary tube metering device is a fixed bore device, itcontrols refrigerant flow by pressure drop.

Due to surface tension of water the component T cos @ acting all along the circumference of the capillary tube 2 pi r would get added as 2 pi r T cos@. Here @ is the angle of contact of water with the material of the tube ie glass.

Hence this uplifts the water to a height till its weight gets balanced by 2 pi r T cos@.

The tubes are called capillaries.
All sorts of tubes ("vessels") carry blood around the body, but the smallest are known as "capillaries", taken from Latin capillaris ("of hair", since capillaries are as thin as hairs).
The smallest of blood vessels are capillaries.

Arteries feed into capillaries, the capillaries give oxygen and nutrients to every cell in the body and take toxins and CO2 from every cell in the body, from there the blood in the capillaries go into your veins (the blue blood vessels) which go to your heart.

Simple diffusion.

This exchange allows easy diffusion of gasses back and forth.

Capillaries work in the same way as vessels and veins but they also help by receiving food molecules from the small intestine. And also if a vessel or vein get damaged, they can divert blood away from the injury to reduce blood loss.

Capillaries cover the alveoli in order to maximize the area for gas exchange between the lungs and the blood. Carbon dioxide is released from the blood through the capillary walls and into the alveoli, while oxygen is picked up from the alveoli through the capillary walls and into the blood.

CAPILLARIES

Capillaries are the smallest of all blood vessels and form the connection between veins and arteries. As arteries branch and divide into arterioles and continue to reduce in size as they reach the muscle they become capillaries. Here the capillaries form a capillary bed, which is a vast expanse of very small vessels forming a network throughout the muscle. However, unlike veins and arteries, their main function is not transporting blood. They are specially designed to allow the movement of substances, mainly gases Oxygen and Carbon Dioxide into and out of the capillary.

VEINS

Veins serve to return blood from organs to the heart. Veins are also called "capacitance vessels" because most of the blood volume (60%) is contained within veins. In systemic circulation oxygenated blood is pumped by the left ventricle through the arteries to the muscles and organs of the body, where its nutrients and gases are exchanged at capillaries, the blood then enter veinules, then veins filled with cellular waste and carbon dioxide. The de-oxygenated blood is taken by veins to the right atrium of the heart, which transfers the blood to the right ventricle, where it is then pumped through the pulmonary arteries to the lungs. In pulmonary circulation the pulmonary veins return oxygenated blood from the lungs to the left atrium, which empties into the left ventricle, completing the cycle of blood circulation.

a ball , tightly coiled capillaries within a kidney nephron where renal filtration occurs

So they can diffuse their nutrients into the interstitial space between cells and allow red blood cells, one by one, through. They can be so small that a single red blood can travel in and out easily.

These thin walls are whats called semi-permeable. As mentioned before they let certain things in and certain things out. For example within the alveoli in the lungs gas exchange takes place. The semi-permeable membrane walls of the capillaries allows o2 (oxygen) into the blood and they will let out co2 (carbon dioxide)

No, arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are where blood disperses throughout areas in the body. capillaries are sort of in between, but not really.

Continous capillaries contain tight junctions and are less "leaky " than fenestrated capillaries. They only allow the movement of water and small ions, whereas fenestrated capillaries contain many fenestrae or pores and allow many molecules with the exception of medium and large proteins to pass

Arteries,veins and capillaries are the blood vessels which help in transporting blood from one organ to another organ.

Capillary density within tissues varies directly with tissues' rates and metabolism.

Venous blood glucose level will be approximately 10-15% higher.

Continuous-Fenestrated-Sinusoids Capillaries

D.

capillaries are found in muscle, skin, lung, central nervous system, and other tissues, and characterized by an uninterrupted endothelium, a continuous basal lamina, fine filaments, and numerous pinocytotic vesicles.
All over your body.