Circulatory System - The Heart
- Created by: hxhh
- Created on: 18-04-22 15:12
View mindmap
- Circulatory System : Heart
- Circulates food and oxygen molecules around the body
- Steps of the circulatory system
- 1. Blood enters the atria via the pulmonary vein and the vena cava
- 2. The atria contract, pushing the blood into the ventricles.
- 3. The heart valves close to stop the blood flowing backwards
- 4. The ventricles contract, forcing the blood out of the heart through the aorta and pulmonary artery
- 5. The blood flows to the organs via the arteries and comes back to the heart via the veins
- 6. The atria fills and the cycle repeats again
- Helping the Heart
- Statins - Drugs that lower your cholesterol levels. Block a substance your body needs to make cholesterol.
- Pros - may remove other diseases, low cholesterol, protects against heart attacks, reduces risk of strokes
- Cons - Effect is not instant, can cause build-up of plaque, must be taken regularly, causes negative side-effects
- CHD - Coronary Heart Disease ; When the coronary artery, which supplies the heart with oxygenated blood, becomes narrow due to cholesterol build-up (plaque)
- CHD can cause pain, myocardial infarction (heart attack) or death
- Stents - tubes that are inserted into arteries to widen them and keep them open, to make sure blood can pass through
- Pros - low risk of heart attack, effective for a long time, recovery time is quick
- Cons - risk of complications during operation, risk of infection from surgery, risk of thrombosis
- Heart Transplants - Heart from a recently deceased person replaces the patient's heart
- Pros - Improves quality of life, can be lifesaving
- Cons - expensive operation and aftercare, few donors are available, recovery time is long, risk of rejection
- Statins - Drugs that lower your cholesterol levels. Block a substance your body needs to make cholesterol.
Comments
No comments have yet been made