Name the structure that connect both artery and veins at tissues and write their functions
Answers
Answer:
Blood is transported in arteries, veins and capillaries.
Blood is pumped from the heart in the arteries. It is returned to the heart in the veins.
The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the cells across their walls.
Arteries Veins
Always carry blood away from the heart Always carry blood to the heart
Carry oxygenated blood, except for the pulmonary artery Always carry deoxygenated blood, except for the pulmonary vein
Carry blood under high pressure Carry blood under low or negative pressure
Have thick muscular and elastic walls to pump and accommodate blood Have thin walls - have less muscular tissue than arteries
A type of supporting tissue called connective tissue provides strength Have less connective tissue than arteries
The channel in the blood vessel that carries blood - the lumen - is narrow Have a wide lumen