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6 questions
Which chamber of the heart has the thickest muscle wall?
The diagram shows a section through the heart. Which part pumps blood to the aorta?
A
B
C
D
The diagram shows a vertical section through a human heart. What are X and Y?
Left atrium and right ventricle
Right atrium and left ventricle
Right atrium and right ventricle
Left Atrium and Left Ventricle
Why is the circulatory system of mammals described as a double circulation?
In which list do all three blood vessels carry oxygenated blood?
aorta, pulmonary artery, renal artery
aorta, pulmonary vein, renal artery
vena cava, pulmonary artery, renal vein
vena cava, pulmonary vein, renal vein
The diagram shows the human heart. Which two chambers contract at the same time?
W and X
Z and Y
W and Z
X and Y
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