quiz 4 Flashcards
In terms of heart structure, what is the function of a valve?
To the prevent the backflow of blood
Why dont veins need thick muscle walls and elastic tissue?
They dont need to withstand high blood pressure
Which chambers contract to pump blood to the body and lungs?
The ventricles
Give one advantage of using mechanical valves
They last for a long period of time and therefore do not replacing often
What is the name of the heart muscle?
cardiac muscle
What is an artifical peacemaker?
Electrical devices used to control the rate of the heartbeat
Which type of blood vessels carry blood at pressure?
arteries
What is the function of red blood cells?
To carry oxygen around the body
Describe the structure of an artery
Thick muscle walls, thick layers of elastic tissue and narrow lumen
Which type of blood vessels carry blood at low pressure?
Veins
What is a mechanical valve?
valves made of metal or carbon that open and shut with each heartbeat
What is a lumen?
The hollow space inside blood vessels
Name the blood vessel that brings oxyegnated blood to the heart
Pulmonary vein
Give one disadvantage of using statins to treat coronary heart disease(CHD)
Statins are a pill which someone may forget to take
Give one reason a red blood has no nucleus
Leaves space for the haemoglobin
