During external respiration, the $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$ is greater in the blood of the pulmonary capillaries than in the alveoli.

Question

Quizplus · Accepted Answer

This is true. The blood in the pulmonary capillaries carries carbon dioxide (CO2) from the body's tissues to the lungs to be exhaled. The CO2 moves from an area of high concentration in the blood to an area of low concentration in the alveoli, where it can be exhaled out of the body. Therefore, the $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$ in the pulmonary capillaries is higher than in the alveoli during external respiration.

During External Respiration, The PCO2\mathrm { P } _ { \mathrm { CO } _ { 2 } }PCO2​​

During External Respiration, The $\mathrm { P } _ { \mathrm { CO } _ { 2 } }$