Question

question 10 of 10
people with heart problems often have trouble breathing. why would this happen?
a. the heart provides the lungs with oxygen.
b. red blood cells are produced in the lungs.
c. the pumping of the heart is tied to the respiratory system.
d. the lungs are the organs that bring carbon dioxide into the body.

Explanation:

The heart and respiratory system work together. The heart pumps blood. Blood picks up oxygen in the lungs (lungs bring oxygen in, not carbon dioxide as in D; A is wrong as lungs provide oxygen to blood). Red blood cells are made in bone marrow (not lungs, so B is wrong). The coordinated function (heart pumping blood that interacts with lungs in respiration) means heart problems can affect breathing.

Answer:

C. The pumping of the heart is tied to the respiratory system.