Structure of the human heart

Question 1

What is the heart made from?

Answer 1

= cardiac muscle
= consists of 4 chambers

Question 2

What are the top and bottom chambers called?

Answer 2

= left + right atrium
= left + right ventricle, ventricles have a thicker muscle compared to the atrium

Question 3

How are atrium seperated from the ventricles?

Answer 3

= atrioventricular valves
= left; bicupsid valve
= right: tricupsid valve

Question 4

What do the tendious cords do?

Answer 4

= make sure valves open in the right direction

Question 5

What is the septum?

Answer 5

= how the left and right sides of the heart are seperated
= prevents blood passing directly between the 2 sides of the heart

Question 6

What happens to deoxygenated blood?

Answer 6

= enters the right atrium through the vena cava- has 2 branches, superiod from the upper parts of body, inferior from lower parts
= pumped from right atrium to right ventricle- pumps deoxuganetd blood out of the heart ro the lungs by pulmonary artery
=

Question 7

What happens to oxygenated blood?

Answer 7

= in the lungs the blood becomes oxygenated
= returns from the lungs to the heart- pumonary vein
= brings into left atrium and passes into left ventirlc,e pumps blood out of aorta
= transfers oyxgenated blood into the body

Question 8

Do right and left side of the heart contract at the same time?

Answer 8

= yes

Question 9

why does the left ventricle have a thicker muscular wall than right?

Answer 9

• left pumps blood around whole body
  = right pumps blood to lungs

Question 10

WHat is the purpose of the coronary artery?

Answer 10

= carries oxygen and glucose
= to heart muscles