The Circulatory System

Question 0

What are the 4 chambers in the heart

Answer 0

Right atrium
Right ventricle
Left atrium
Left ventricle

Question 1

What is the overall link between the lungs , heart and the body cells with reference to the fluid flow of blood

Answer 1

The heart pumps blood to the lungs , where it collects oxygen and releases co2
The blood flows back to the hearty and is pumped around all the tissues of the body

Question 2

Describe the flow of blood through the heart and it’s associated blood vessels

Answer 2

Blood is carried to the heart by veins: the vena cara ( from body )
The pulmonary vein (from lungs )
Blood is carried away from the heart by arteries: the aorta (to body)
The pulmonary artery (to lungs )

Question 3

Explain the different in thickness of walls of the ventricles

Answer 3

Much thicker on left side because it pumps blood around the body whereas the right sided only pumps blood to the lungs

Question 4

Where does the heart obtain it’s blood supply from

Answer 4

Coronary artery

Question 5

What is the blood flow in the heart

Answer 5

The blood enters the right atrium by the main vein called then vena cara
The right atrium contracts which pumps blood into the right ventricle
It is then pumped out to the lungs through the pulmonary artery
It then returns from the veins through the pulmonary veins to the left atrium
Pumped into left ventricle - contraction of muscular walls forces blood Into the main artery (aorta)
Aorta takes blood to all parts of the body

Question 6

What is the main difference between arteries and veins

Answer 6

Arteries: carries blood away from the heart and into other organs in body, thick muscular wall to withstand high pressure of oxygenated blood coming from the heart
Veins: carries blood to the heart and away from other organs in the body, thinner walls- deoxygenated blood flows along veins at low pressure

Question 7

Give examples of substances transported in blood

Answer 7

Oxygen 
Minerals
Glucose
Co2
Hormones 
Vitamins
Amino acids

Question 8

What Is the function of haemogloblin

Answer 8

It associates and dissociates with oxygen

It is the red pigment present in red blood cells

Question 9

What are the features of capillaries (capillary network) that allows efficient gas exchange

Answer 9

Thin walled

Large surface area

Question 10

What are red blood cells and how are they specialised

Answer 10

They are biconcave in shape
They have no nucleus
Contain haemoglobin
^this allows them to transport oxygen in the form of oxyhemoglobin