Heart & Cardiac Cycle

Question 1

What is the function of the lungs?

Answer 1

Lungs are needed for gas exchange.

Question 2

How have alveoli adapted for gas exchange?

Answer 2

-Well ventilated
-Good blood supply
-Thin membrane (1 cell thick)
-Large surface area

Question 3

What 3 things is the circulatory system made up off?

Answer 3

-Heart
-Blood vessels
-Blood

Question 4

What is humans circulatory system?

Answer 4

It is a double circulatory system, meaning it has 2 loops

Question 5

What are the 4 chambers of the heart?

Answer 5

-Right ventricle
-Right atrium
-Left ventricle
-Left atrium

Question 6

Why are the walls made of muscle?

Answer 6

To pump blood around the body

Question 7

Why is the left side of muscle thicker?

Answer 7

It has to pump with greater force so it will travel further through the body

Question 8

Where do the artery and vein go?

Answer 8

Artery - away from heart
vein - into the heart

Question 9

What does VAVA VAVA stand for?

Answer 9

It is the double circulatory system:

V - vein (pulmonary)
A - atrium (left)
V - ventricle (left)
A - Aorta

V - Vena Cava
A - atrium (right)
V - ventricle (right)
A - artery (pulmomary)

Question 10

What is a pacemaker?

Answer 10

Something that maintains a steady resting heart rate