Basics
What is the circulatory system responsible for transporting in the body?
Oxygen, nutrients, hormones, and waste products.
Which type of animal uses single circulation?
Fish
How many chambers does the human heart have?
4
What is used to measure heart rate?
Pulse or heart rate monitor
What is coronary heart disease (CHD)?
A condition where the coronary arteries become narrowed or blocked.
What are the two types of circulatory systems in animals?
Single circulation and double circulation.
Which type of circulation do humans have: single or double?
Double circulation
What are the upper chambers of the heart called?
Atria
Name one way the heart controls blood flow in the correct direction
Valves.
Name one major cause of coronary heart disease.
Fatty deposits (plaque) in arteries / Atherosclerosis.
What organ is the main pump of the circulatory system?
The heart
What is the main advantage of double circulation over single circulation?
- It allows higher blood pressure
- more efficient oxygen delivery.
Name the blood vessel that carries oxygenated blood from the lungs to the heart.
Pulmonary vein
These Arteries supply the heart with blood
What is Coronary Arteries
Name two ways to prevent coronary heart disease
Eat a healthy diet, exercise regularly
Which system works closely with the circulatory system to exchange gases?
The respiratory system
In single circulation, how many times does blood pass through the heart in one complete circuit?
once
What valve prevents backflow of blood into the left atrium?
The atrioventricular valve
Which instrument records the electrical activity of the heart?
Electrocardiogram (ECG or EKG)
What is the largest Artery in the body
What is the Aorta
Define the circulatory system
A system that circulates blood through the body, delivering oxygen and nutrients and removing waste products
Name the two loops in double circulation.
Pulmonary circulation and systemic circulation
In a heart diagram, which side of the heart contains deoxygenated blood?
The right side
Why does the heart rate increase during exercise?
To deliver more oxygen and nutrients to muscles and remove carbon dioxide faster.
How can regular exercise help prevent coronary heart disease?
It strengthens the heart and improves blood circulation, reducing plaque buildup.