Video Transcript
The respiratory system has an
excretory role. Which of the following correctly
confirms this statement? (A) The respiratory system has a
role in the excretion of water and carbon dioxide. (B) The respiratory system has a
role in the excretion of water only. (C) The respiratory system has a
role in the excretion of oxygen only. (D) The respiratory system has a
role in the excretion of water and oxygen.
Our cells need energy to
survive. Oxygen helps break down glucose
from our food to convert it into energy. This process is called cellular
respiration, and it produces water and carbon dioxide as waste products.
Our lungs are a specialized organ
that takes oxygen in from the air we breathe. This oxygen can then dissolve in
the blood and circulate in our body to be delivered to cells. After cellular respiration, the
waste products water and carbon dioxide are produced that can dissolve in the blood
and be excreted by the lungs.
Therefore, the excretory role of
the lungs is given by answer choice (A). The respiratory system has a role
in the excretion of water and carbon dioxide.
