What is the fluid which flows in blood vessels?

What is the fluid which flows in blood vessels?

The lymph vessels carry lymphatic fluid. This is a clear, colorless fluid made of water and blood cells.

What flows through the capillary?

Capillaries are small, thin blood vessels that connect the arteries and the veins. Their thin walls allow oxygen, nutrients, carbon dioxide and waste products to pass to and from the tissue cells.

What is the direction of blood flow in capillaries?

Blood flows in the same direction as the decreasing pressure gradient: arteries to capillaries to veins. The rate, or velocity, of blood flow varies inversely with the total cross-sectional area of the blood vessels.

What means avascular?

: having few or no blood vessels avascular tissue.

Why does diffusion occur in capillaries?

The thin walls of the capillaries are composed of a single layer of endothelial cells. As a result, gasses such as oxygen and carbon dioxide can diffuse through their walls, as can lipid soluble substances. This exchange of water and solutes occurs in response to the pressure gradient across the capillary wall.

How does diffusion work in the capillaries?

Diffusion, the most widely-used mechanism, allows the flow of small molecules across capillaries such as glucose and oxygen from the blood into the tissues and carbon dioxide from the tissue into the blood. Transcytosis is the mechanism whereby large, lipid-insoluble substances cross the capillary membranes.

How does blood flow upwards?

Blood must flow upward throughout your body to make it back to the heart – working against gravity. Your calf and leg muscles help push that blood upward, while valves (small flaps located inside the vein), open up and allow blood to pass through. Valves close as blood passes through to keep it from flowing back down.

What is the correct direction of blood flow?

The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

What direction does blood flow through the body?

Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood is pumped to the lungs where it is reoxygenated before returning to the heart. Figure 40.4A.