Gas Exchange (HEART + CIRCULATION)

Question 1

Define double circulatory system and what does it provide

Answer 1

Blood flows twice through the heart for each circulation of the bod–> this means:
Blood pressure increases, therefore rate of blood flow to the tissues is great
Delivery of oxygen to the cells is quicker, this is important in mammals as they have a high metabolism.

Question 2

What is meant by an closed circulatory system is humans

Answer 2

Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness.

Question 3

Which side of the heart pumps oxygenated blood

Answer 3

Left (actually right on paper) pumps oxygenated blood
Right (actually left on paper) carried deoxygenated blood

Question 4

Why is the right ventricle thinner than the left ventricle

Answer 4

Right ventricle only has to pump blood back to the heart whereas left ventricle pumps blood ll around the body

Question 5

Give the list of all of the blood vessels in the heart starting with aorta

Answer 5

Aorta
Pulmonary vein
Semi lunar valve
Left atrium
Bicuspid valve
Left ventricle
Right ventricle
Tricuspid valve
Right atrium
Vena Cava
Pulmonary artery

Question 6

Give the equation for cardiac output