The Heart

Which part of the circulatory system takes de-oxygenated blood back to the lungs?

Veins - Pulmanory Circulation.

Which part of the circulatory system does oxygenated blood leave the heart to travel around the body?

The arteries - Aorta

The heart is an example of a muscle, what sort of muscle is it?

Cardiac Muscle.

Explain how the heart is specialised to perform its own function within the circulatory system.

Resposible for pumping blood around body. 4 chambers each have own function, chambers contract in an orderly sequence to make sure oxygenated and de-oxygenated can successfully deliver oxygen and nutrients to the cells and tissues around the body. Muscles around the heart contract to force blood into veins and arteries to deliver to the body.

In a healthy heart what prevents the backflow of blood?

Valves

What are the three types of blood vessels?

1. Veins

2. Arteries

3. Capillaries

What are the role of capillaries?

Tiny blood vessels that connect arteries and veins. Enable cells to exchange oxygen and nutrients. release carbon dioxide and waste products back into veins to carry back towards the heart. Distribute oxygen carried on the hemoglobin of the red blood cells to all cells of the body. They have thin walls to be able to exchange oxygen, carbon dioxide and waste products. 

Discuss the function of the veins.

Carry de-oxygenated blood back to the heart to be released for gas exchange in the lungs.

Explain the role of arteries.

Carry oxygenated blood to cells in the body. Controlled by hormones and signals from the nervous system. They are the largest and strongest blood vessels as the pressure of the blood is higher. 

Explain the role of capillaries.

Connect veins and arteries. Enable nutrients and oxygen to get to cells of body and release waste product.