Question

question 4 of 10
why do problems with the heart lead to difficulty breathing?
a. the pumping action of the lungs moves oxygen through the body.
b. the lungs transfer white blood cells to the heart.
c. the heart is the organ that brings carbon dioxide from the air.
d. the circulatory and respiratory systems work together.

Explanation:

The circulatory system, with the heart as its main pump, and the respiratory system, which involves the lungs for gas - exchange, are closely interconnected. When there are heart problems, it can disrupt the coordinated function between these two systems, leading to breathing difficulties. Option A is incorrect as the heart, not the lungs, is the main pump for blood circulation carrying oxygen. Option B is wrong because the lungs do not transfer white - blood cells to the heart. Option C is incorrect since the lungs, not the heart, bring in oxygen from the air and expel carbon dioxide.

Answer:

D. The circulatory and respiratory systems work together.