Question

are all the blood vessels rigid?how many of them are rigid?​

Answer 1

Answer:

five blood vessels are attached to the heart. not all the blood vessels are rigid. Mostly arteriosclerotic blood vessels are rigid. The arteries move under pressure so they have thick walls. When walls become rigid, they lose their elasticity. when they lose elasticity it becomes difficult for them to carry blood as deposits get started inside them. The five types of blood vessels help to carry blood away and toward the heart. Mostly rigidity occurs in old age.