Transport in Humans

Which chamber of the heart receives blood directly from the rest of the body?

• A

• B

• C

• D

Answer explanation

A is the right atrium which receives blood from the rest of the body through the vena cava.

Arteries carry oxygenated blood away from the heart. Veins carry deoxygenate blood to the heart. What is/are the exception(s)?

• pulmonary artery

• pulmonary vein

• aorta

• superior vena cava

Answer explanation

Pulmonary artery carries deoxygenated blood AWAY from the heart to the lungs.

Pulmonary vein carries oxygenated blood from the lungs TOWARDS the heart

What is the function of blood platelets?

• Production of antibodies

• Transport of oxygen

• Formation of clots

• Transport of carbon dioxide

Which statement is correct for all arteries in the human body?

• They carry blood at low pressure.

• They contain valves.

• They have thin walls.

• They carry blood away from the heart.

Answer explanation

A is wrong has arteries carry blood at high pressure.

B is wrong as only veins contain valves.

C is wrong as arteries have thick muscular walls to withstand the high blood pressure.

Through which vessel does blood pass from the heart to the lungs?

• A

• B

• C

• D

Which blood vessel is shown in the middle of the image?

• artery
• vein
• capillary
• pulmonary

What is the function of the structure labelled Q?

• It controls the amount of blood leaving the heart.

• It increases the pressure in part R.

• It prevents backflow of blood into part P.

• It prevents blood flowing into the vena cava.

The table shows the characteristic of blood in a particular blood vessel in the body.

Which blood vessel fits the description above?

• aorta

• pulmonary artery

• pulmonary vein

• vena cava