The Heart

Question 1

What is the purpose of the circulatory system

Answer 1

The circulatory system supplies all the cells and body organs with the appropriate amount
of nutrients and oxygen they require. The circulatory system also carries the waste products
to the organs of excretion.

Question 2

Describe the heart

Answer 2

It’s a hollow muscular organ made of cardiac muscles
which is a strong type of muscles that helps keeping the
heart contracting to pump blood to all the body through
the entire life without getting fatig

Question 3

What is the septum

Answer 3

Separates the oxygenated
blood in the left heart side
from deoxygenated blood
in the right heart side
prevent mixing of blood

Question 4

Name all 4 chambers of the heart

Answer 4

1. Right atrium
2. Left atrium
3. Right ventricle
4. Left ventricle

Question 5

Explain why the walls of the left ventricle thicker than the walls of the right ventricle

Answer 5

Left ventricle has stronger muscles to contract to pump blood with higher blood pressure to overcome the high distance and the resistance as blood pumped through aorta to all body organs, while the right ventricle pumps blood to the lungs only through pulmonary artery

Question 6

Pulmonary

Answer 6

Usually relates to the lungs

Question 7

Deoxygenated blood enters the _____ side of the heart

Answer 7

Right

Question 8

Describe the path of blood

Answer 8

Deoxygenated blood returns from the body and reaches the right atrium which then contracts to allow blood to flow to the right ventricle which again contracts allowing blood to flow to the blood where gas exchange happens making oxygenated blood, it then enters the left atrium which contracts for blood pass to the left ventricle and finally blood enters the body for cells to exchange nutrients and necessities

Question 9

What are valves

Answer 9

Structures in the heart that allow blood flow in one direction and prevent its back flow

Question 10

Two types of valves

Answer 10

Atrioventicular: connect between atrium and ventricle
Semilunar: connect between ventricle and pulmonary artery/aorta

Question 11

Name the two atrioventicular valves

Answer 11

Tricuspid: right side
Bicuspid: left side

Question 12

Name the 2 semilunar valves

Answer 12

Pulmonary: right
Aortic: left

Question 13

Adaptations of the valve

Answer 13

The flaps of the valves are attached to the inner heart walls by tendons, which allow the valve to close and hold the valve flap in place preventing the valve from flipping up