Capillaries have very thin walls. Explain why capillaries need to have thin walls in comparison to other blood vessels.
Slide 15 - Open vraag
Referring to their circulatory system, mammals have a double circulation. This means that…
A
…there are two types of blood vessels: arteries and veins.
B
…there are two separate circulations in their bodies; blood from one circulation never mingles with blood from the other circulation.
C
…there are two circulations: one from the heart to the lungs and back and one from the heart to the rest of the body and back.
D
…there are two circulations: one from the heart to the upper parts of the body and one from the heart to the lower parts of the body.
Slide 16 - Quizvraag
Which of the following human blood vessels are poor in oxygen? Write down the correct names. superior vena cava / pulmonary artery / iliac vein (vein of the legs) / aorta / pulmonary vein