diffusion of oxygen and carbon dioxide occurs in the
Respiratory system
The respiratory system transports oxygen from the air we take a breath, through a system of tubes, into our lungs and then diffuses it into the bloodstream, whilst CO2 makes the opposite journeying.
Respiratory system structure and function
Passage of air into the lungs
- Air enters the body and is warmed as information technology travels through and through the mouth and olfactory organ.
- IT then enters the trachea.
- The trachea divides into cardinal bronchi. United bronchus enters each lung.
- Each bronchus branches out into smaller tubes called bronchioles. Air travels through these bronchioles.
- At the end of the bronchioles, the atmosphere enters one of the many millions of alveoli where gaseous switch over takes put together.
External respiration
Respiration is the terminal figure given to the process of fetching air into and out of the lungs.
Two valuable structures for breathing are the diaphragm and intercostal muscle muscles .
The stop is a tack of muscle that separates the chest (or thoracic) cavity from the rest of the physical structure.
The intercostal muscles are saved between the ribs and they control rib movement.
Inspiration (inhalation)
The pessary contracts and moves downwards. The os muscles squeeze and go under the ribs upwards and outwards. This increases the size of the chest and decreases the atmospheric pressure inside it which sucks vent into the lungs.
Going (respiration out)
The pessary relaxes and moves back to its vaulted shape. The musculus intercostalis muscles relax so the ribs move inwards and downwards under their own weight unit. This decreases the size of the chest and increases the air insistence in the thorax so air is forced tabu of the lungs.
Composition of the broadcast we breathe
| Breathed in | Inaudible retired |
|---|---|
| 21% oxygen | 16% oxygen |
| 0.03% CO2 | 4% carbon dioxide |
The human body is designed to dupe oxygen and to take carbon dioxide. The respiratory system, in combination with the vas system of rules, is responsible for providing this mathematical function.
Gas central
Gas substitution occurs at the alveoli in the lungs and takes aim by diffusion. The alveoli are surrounded by capillaries so oxygen and carbonic acid gas diffuse between the air in the alveoli and the blood in the capillaries.
Diffusion is the movement of gas from an area of high concentration to an orbit of low concentration.
At that place is a richly concentration of oxygen in the alveoli and a low concentration of oxygen in the blood, so oxygen diffuses from the alveoli into the profligate.
In that location is a high concentration of carbon dioxide in the stemma and a low concentration in the alveoli, soh CO2 diffuses from the blood into the alveoli.
Both oxygen and CO2 are capable of combining with an iron-rich protein in the blood called haemoglobin. Hemoglobin carries oxygen to make up exchanged at the working heftines and carbon paper dioxide to be exchanged at the lung.
Capillaries surround the alveoli in the lungs. Both the capillaries and alveoli walls are very thin - just one cubicle thick. They are made of semi-permeable membranes which allow oxygen and carbonic acid gas to transit them.
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Describe the procedure of gas exchange at the muscles.
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In the muscle there is a high concentration of carbon dioxide and in the bloodstream on that point is a high concentration of O.
Oxygen diffuses from the bloodstream into the muscles and C dioxide diffuses into the rakehell from the muscles.
diffusion of oxygen and carbon dioxide occurs in the
Source: https://www.bbc.co.uk/bitesize/guides/ztkr82p/revision/1
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