Final answer:
The process of respiration in the body starts with air entering the body, moving through the respiratory structures, diffusing across capillaries, being transported to the heart, distributed through the body, and the oxygen is utilized by the body's cells via diffusion.
Step-by-step explanation:
The process of respiration in the body follows this sequential order:
- Air enters the body and travels through the upper and then the lower respiratory structures.
- O2 crosses into the capillaries in the pulmonary system from the alveoli by the process of diffusion.
- Re-oxygenated blood is carried from the lungs to the heart through the pulmonary veins.
- The heart then pumps this oxygenated blood which is distributed throughout the body via blood vessels.
- Lastly, the gas exchange between the oxygenated blood and the cells of the body occurs through the capillaries via diffusion across cellular endothelium.
This is a continuous and efficient process ensuring every cell has the oxygen it needs for energy production.
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