Describe two anatomical differences between arteries and vei

Describe two anatomical differences between arteries and veins. What is the most common cell type found in blood?

Solution

Q.1 Two Anatomical difference between arteries and veins?

Arteries

Veins

Wall-Arteries have thick, elastic, muscular walls. The wall of the artery consists of three layers, namely tunica interna, tunica media and tunica externa. These characteristics give them the strength and elasticity needed to cope with the high pressure surges of oxygenated blood coming from the heart.

Wall-veins have thin walls with elastic fibers possess wide lumen because The elasticity allows the walls to recoil back to their original shape they have increased in diameter to allow the surge of blood through.

Valves- do not have any valves. Arteries do not need valves as the blood is flowing at such a high pressure that it cannot go backwards

Valves- one way valves. Veins need valves as the blood flowing through them is at such a low pressure that they need something to prevent it going backwards. They are needed to prevent blood pooling

Q.2 Most common cell type found in blood?

Answer- erythrocytes- RBCs are the most common type of cell found in the blood. Each cubic millimeter of blood contains 4-6 million cells. Diameter is only 6 microm. RBCs are small enough to squeeze through the smallest blood vessels. RBC takes up oxygen in the lungs and releases it into tissue.

Erythrocytes are rich in hemoglobin iron-containing biomolecule binds oxygen it is responsible for the red color of the cells.

Arteries	Veins
Wall-Arteries have thick, elastic, muscular walls. The wall of the artery consists of three layers, namely tunica interna, tunica media and tunica externa. These characteristics give them the strength and elasticity needed to cope with the high pressure surges of oxygenated blood coming from the heart.	Wall-veins have thin walls with elastic fibers possess wide lumen because The elasticity allows the walls to recoil back to their original shape they have increased in diameter to allow the surge of blood through.
Valves- do not have any valves. Arteries do not need valves as the blood is flowing at such a high pressure that it cannot go backwards	Valves- one way valves. Veins need valves as the blood flowing through them is at such a low pressure that they need something to prevent it going backwards. They are needed to prevent blood pooling