blood vessels Flashcards
1
Q
what are arterioles
A
they are smaller divisions of srteries after they reach an organ
2
Q
what are arteries
A
they are responsible for transporting blood from the heart to the rest of the organs
they have walls with thick layers of muscle which maintain a high pressure for efficient blood flow around the body
3
Q
how are arteries able to stretch
A
due to then folded endothelium and elastic fibres
4
Q
what are veins
A
they bring blood back to the heart
they have a wider lumen than the arteries allowing bloock to travel at low pressures
they also have thin muscle fibres and elastic fibres
they contain valves to prevent the backflow of blood
5
Q
what are cappillaries
A
they pass close to body cells allowing for gas exchange between bood and organs
