Heart and Circulatory System 2

The muscle that separates the two sides of the heart is called the.......................

• Atrium

• Septum

• Vena cava

• Aorta

Tick three answers that apply. The wall of the left hand side of the heart is thicker than the right hand side is because..............

• closest to the lungs

• contains more muscle

• has a longer distance to push the blood to all the organs

• pushes blood under high pressure

Calculate the cardiac output of a heart that pumps 0.07 litres of blood 55 times per minute.

• 4.85 litres/min

• 4.00 litres/min

• 3.85 litres/min

Calculate the stroke volume for a cardiac output of 5 litres/min and a heart rate of 50 beats/min.

• 0.10 litres of blood

• 1.0 litres of blood

• 10.2 litres of blood

The heart is called a 'double pump' because

• It is because the heart works twice as fast most of the time

• The first pump carries oxygen-poor blood, and the second pump carries oxygen-rich blood.

• It is because the heart pumps double the amount of blood.

Which side of the heart contracts more strongly?

• Right hand side

• Left hand side

• Neither they both contract with equal pressure

What is the main organ of our circulatory system?

• heart

• lungs

• skin

• liver

In what part of the body are red blood cells made?

• arteries

• veins

• bone marrow

• heart

The heart is about the size of your ________.

• foot

• brain

• ear

• fist

What makes the heartbeat sound we hear?

• ventricles squeezing blood.

• circulating blood

• valves opening and closing

• heart muscle contracting

Tags

NGSS.4-PS3-2