human heart

Question 1

The left and right sides of the heart are separated by a wall of muscular tissue, called the

which ones of them differ form ventricles to atria

Answer 1

septum

interatrial septum, septum which separates the left and right atria

while the portion of the septum which separates the left and right ventricles is called the interventricular septum

Question 3

Valves in the heart:
Open when ….

close when..

Answer 3

Open when the pressure of blood behind them is greater than the pressure in front of them

Close when the pressure of blood in front of them is greater than the pressure behind them

Question 4

tricuspid valve

Answer 4

between The right atrium and right ventricle , which is otherwise known as the tricuspid valve

prevent blood from flowing back into the atria from the ventricles.

Question 5

bicuspid valve

Answer 5

The left atrium and left ventricle are separated by the mitral valve, which is otherwise known as the bicuspid valve

prevent blood from flowing back into the atria from the ventricles.

Question 6

What protects the heart

Answer 6

It is protected in the chest cavity by the pericardium, a tough and fibrous sac

Question 7

semi lunar valves

Answer 7

prevent backflow of blood from the arteries into the ventricles.

between the left ventricle and the aorta (aortic valve) and between the right ventricle and the pulmonary artery