Blood Vessels Flashcards
Which blood vessels transport oxygenated blood to cells?
Arteries
Which blood vessels transport deoxygenated blood to cells?
Veins
Which blood vessels transport blood to individual cells once it is transported to organis?
Capillaries
Which blood vessels transport waste products from the cells?
Capillaries
Which blood vessels transport waste products away from organs?
Veins
Which blood vessels transport oxygenated blood to organs?
Arteries
How are arteries and veins joined together?
By capillaries
Which blood vessels travel away from the heart?
Arteries
Which blood vessels travel to the heart?
Veins
What is the walls of blood vessels made up of?
Muscle and elastin
Why do arteries not have valves?
Because they have a high pressure so blood won’t flow back anyway
Why do veins have valves?
Because they transport blood at a low pressure and without the valves blood will flow blackwards
What is the function of the thick outer collagen wall in arteries?
Help withstand blood pressure and stops the artery from bursting
What is the function of the thick elastic and smooth muscle tissue in the middle tissue layer of arteries?
Allows the vessel to stretch and recoil which helps maintain blood pressure and push blood along
What are the smallest arteries known as?
Arterioles
Why do veins have a lower resistance to mass flow of blood?
They have a lower pressure
Why are the walls in veins thinner?
There is less elastic tissue and smooth muscle in the middle layer as the blood is under lower pressure
What are the smallest veins known as?
Venules
What is the wall of capillaries made up of?
One cell thick endothelium
What is the function of endothelium?
Provide a short diffusion distance for gas exchange (of O2 and CO2) and other substances (glucose)
What is the function of gaps between cells?
Allows exchange of materials
What is the word equation of aerobic respiration?
Glucose + oxygen –> carbon dioxide + water + ATP
Why is oxygen needed in cells of organs?
So the cells can do aerobic respiration and use the oxygen to release energy from glucose
