EXTERNAL RESPIRATION Meaning and
Definition
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External respiration refers to the physiological process of exchanging gases between the external environment and the lungs in multicellular organisms. It is an essential function of the respiratory system that ensures the intake of oxygen and the removal of carbon dioxide, allowing for the efficient oxygenation of the blood.
During external respiration, the process begins with inhalation, where oxygen-rich air is drawn into the lungs through the nose or mouth, passing through the trachea and into the bronchial tubes. These tubes branch out into smaller passages called bronchioles, which ultimately lead to the alveoli. Once the oxygen reaches the alveoli, it diffuses across the thin walls into the surrounding capillaries, mixing with hemoglobin molecules in red blood cells. Simultaneously, carbon dioxide, a waste product of cellular metabolism, is released into the alveoli from the capillaries. This gaseous exchange occurs due to a concentration gradient, where oxygen is higher in the alveoli and lower in the capillaries, while carbon dioxide is higher in the capillaries and lower in the alveoli.
The oxygenated blood is then transported back to the heart, where it is pumped throughout the body, providing oxygen to the cells in various tissues and organs. Conversely, the deoxygenated blood carries carbon dioxide back to the lungs, enabling its elimination from the body during exhalation.
In summary, external respiration is the process by which gases are exchanged between the lungs and the external environment, ensuring the delivery of oxygen to the body's tissues and the removal of carbon dioxide.
Common Misspellings for EXTERNAL RESPIRATION
- wxternal respiration
- sxternal respiration
- dxternal respiration
- rxternal respiration
- 4xternal respiration
- 3xternal respiration
- ezternal respiration
- ecternal respiration
- edternal respiration
- esternal respiration
- exrernal respiration
- exfernal respiration
- exgernal respiration
- exyernal respiration
- ex6ernal respiration
- ex5ernal respiration
- extwrnal respiration
- extsrnal respiration
- extdrnal respiration
Etymology of EXTERNAL RESPIRATION
The word "external respiration" is a compound term composed of two words: "external" and "respiration".
1. External: The word "external" is derived from the Latin word "externus", meaning "outside" or "outer" in English. The term refers to something that is situated on or related to the outside of the body.
2. Respiration: The word "respiration" comes from the Latin word "respirare", which means "to breathe". It is a combination of the prefix "re-" (indicating repetition or reversal) and "spirare" (meaning "to breathe" or "to exhale"). Thus, "respiration" refers to the process of inhaling and exhaling, or the act of breathing.
Similar spelling words for EXTERNAL RESPIRATION
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