Heart And Blood

Question 1

Stents

Answer 1

Advantages:minor operation, opens blocked artery, will work for long time

Disadvantages:risk of invection, risk of complication in surgery, risk of blood clot

Question 2

Statins

Answer 2

Advantages: decreases blood cholesterols, slows down build-up of fatty material in arteries

Disadvantages: drug must be taken regualy, long term, side effectd of taking drug, effects of drug will take time to happen

Question 3

Heart valve

Answer 3

Advantages: more cell respiration, more energy released, less tires

Disadvantages: danger in surgery, infection, valve need replacing, clots may form causing heart attacks

Question 4

What do scientists need to focus on when designing heart valve

Answer 4

It doesn't cause immunity or is rejected
Weather it is long lasting and strong materual
If it will open at the right pressure
It doesn't cause blood clot
It doesn't leak
Not toxic

Question 5

Peacemaker

Answer 5

Advantages: longlasting
Disadvantages: doesn’t treat heart disease, pacients need to avoid magnets and electromagnetic energy fields

Question 6

Adaptions of the aveolus

Answer 6

alveoli have very large surface area to provide maximum diffusion of gases

Each alveolus is surrounded by a network of capillaries near the surface. This means faster rate of diffusion

The alveoli have thin moist walls one cell thick. This provides a short diffusion pathway for gases.