During which phase of respiration does oxygen enter the bloodstream? (2019)

During which phase of respiration does oxygen enter the bloodstream? (2019)

Step 1: Understand that respiration is the process of taking in oxygen and releasing carbon dioxide.
Step 2: Know that inhalation is the act of breathing in air.
Step 3: Realize that when you inhale, air travels into your lungs.
Step 4: Learn that inside the lungs, there are tiny air sacs called alveoli.
Step 5: Understand that oxygen from the air in the alveoli moves into the bloodstream.
Step 6: Remember that this movement of oxygen into the blood happens through a process called diffusion.

Respiration Phases – Understanding the different phases of respiration, particularly inhalation and gas exchange.
Gas Exchange – The process of oxygen diffusing from the alveoli into the bloodstream.