How do our lungs separate oxygen and other gases?
What is so special about our lungs that they seperate oxygen and other gases?
What is so special about our lungs that they seperate oxygen and other gases?
Your lungs are part of a group of organs and tissues that all work together to help you breathe. This system is called the respiratory system. The main job of the respiratory system is to move fresh air into and get waste gases out of the body.The exchange of these gases occurs across cell membranes both in the lungs (external respiration) and in the body tissues (internal respiration).
1.Alveoli: Tiny air-filled sacs in the lungs where the exchange of oxygen and carbon dioxide occurs between the lungs and the bloodstream.
2. Bronchi: Two main branches of the trachea leading into the lungs.
3. Bronchial tree: Branching, air-conducting subdivisions of the bronchi in the lungs.
Mechanism:
The lungs are divided into lobes, each one of which receives its own bronchial branch. Inside the lungs, the bronchi subdivide repeatedly into smaller airways. The terminal bronchioles enter cup-shaped air sacs called alveoli. The average person has a total of about 700 million gas-filled alveoli in the lungs.
A network of capillaries (tiny blood vessels) surrounds each alveoli. As blood passes through these vessels and air fills the alveoli, the exchange of gases takes place.The oxygen concentration is high in air sac, so oxygen passes from the alveoli into the capillaries while carbon dioxide passes from the capillaries into the alveoli.
1. At the beginning of the pulmonary capillary, the hemoglobin in the blood has more carbon dioxide and very little oxygen .The oxygen binds to hemoglobin and the carbon dioxide is released; also from sodium bicarbonate dissolved in the blood of the pulmonary capillary.
2. In aveoli, less carbon dioxide and more oxygen.Therefore, carbon dioxide leaves the blood and passes across the alveolar membrane into the aveoli. This exchange of gases occurs rapidly (fractions of a second).
The carbon dioxide then leaves the alveolus when you exhale and the oxygen-enriched blood returns to the heart. Thus, the purpose of breathing is to keep the oxygen concentration high and the carbon dioxide concentration low in the alveoli so this gas exchange can occur.
Your lungs are part of a group of organs and tissues that all work together to help you breathe. This system is called the respiratory system. The main job of the respiratory system is to move fresh air into and get waste gases out of the body.The exchange of these gases occurs across cell membranes both in the lungs (external respiration) and in the body tissues (internal respiration).
1.Alveoli: Tiny air-filled sacs in the lungs where the exchange of oxygen and carbon dioxide occurs between the lungs and the bloodstream.
2. Bronchi: Two main branches of the trachea leading into the lungs.
3. Bronchial tree: Branching, air-conducting subdivisions of the bronchi in the lungs.
Mechanism:
The lungs are divided into lobes, each one of which receives its own bronchial branch. Inside the lungs, the bronchi subdivide repeatedly into smaller airways. The terminal bronchioles enter cup-shaped air sacs called alveoli. The average person has a total of about 700 million gas-filled alveoli in the lungs.
A network of capillaries (tiny blood vessels) surrounds each alveoli. As blood passes through these vessels and air fills the alveoli, the exchange of gases takes place.The oxygen concentration is high in air sac, so oxygen passes from the alveoli into the capillaries while carbon dioxide passes from the capillaries into the alveoli.
1. At the beginning of the pulmonary capillary, the hemoglobin in the blood has more carbon dioxide and very little oxygen .The oxygen binds to hemoglobin and the carbon dioxide is released; also from sodium bicarbonate dissolved in the blood of the pulmonary capillary.
2. In aveoli, less carbon dioxide and more oxygen.Therefore, carbon dioxide leaves the blood and passes across the alveolar membrane into the aveoli. This exchange of gases occurs rapidly (fractions of a second).
The carbon dioxide then leaves the alveolus when you exhale and the oxygen-enriched blood returns to the heart. Thus, the purpose of breathing is to keep the oxygen concentration high and the carbon dioxide concentration low in the alveoli so this gas exchange can occur.
