Refer to the diagram below of the mammalian circulatory system. If blood is going from the lungs to space 3,what is the name of space 3?
A)left ventricle
B)left atrium
C)right ventricle
D)right atrium
E)pulmonary vein

Question

Refer to the diagram below of the mammalian circulatory system.  If blood is going from the lungs to space 3,what is the name of space 3?
A)left ventricle 
B)left atrium 
C)right ventricle 
D)right atrium 
E)pulmonary vein

Quizplus · Accepted Answer

Space 3 is the receiving chamber for blood returning from the lungs, therefore it is the left atrium, which is responsible for receiving oxygen-rich blood from the lungs. The left ventricle (A) receives blood from the left atrium and pumps it out to the rest of the body. The right ventricle (C) pumps blood to the lungs, while the right atrium (D) receives oxygen-poor blood from the body. The pulmonary vein (E) is responsible for carrying oxygen-rich blood from the lungs to the heart.

Refer to the Diagram Below of the Mammalian Circulatory System