Which of the following is a harmful waste material that leaves the blood and travels through the lungs before leaving the body?
A B C D
CO2. O2. H2O. NaCl.
Question: Which of the following is a harmful waste material that leaves the blood and travels through the lungs before leaving the body?
(A) CO2.
(B) O2.
(C) H2O.
(D) NaCl.

Answer: (A) CO2.
Answer: (C) H2O.
Question: Which of the following is a harmful waste material that leaves the blood and travels through the lungs before leaving the body?
(A) CO2.
(B) O2.
(C) H2O.
(D) NaCl.
Answer: (A) CO2.