Gas Exchange: External and Internal Respiration
Gas exchange occurs between the alveoli and the pulmonary capillaries through the process of diffusion. The gas molecules will move away from highly concentrated areas towards areas with low concentration.
Gas exchange occurs between the alveoli and the pulmonary capillaries through the process of diffusion. The gas molecules will move away from highly concentrated areas towards areas with low concentration.
External Respiration: Occurs between the lungs and the blood
Oxygen poor blood travels through the pulmonary circuit which carries the blood away from the right side of the heart and towards the lungs. When we inhale our lungs (alveoli) fill with a higher level of Oxygen, and lower level of Carbon Dioxide. While the blood is in the lungs (alveoli) it becomes oxygen rich. After the blood is oxygenated it leaves the lungs and travels back to the heart (left side) where it is then distributed to different parts of the body while the carbon dioxide is released from the body when we exhale.
Internal Respiration: Is the exchange of gases that occurs between the blood and tissues. As the blood continues to travel through the body it reaches the capillaries. Cells receive oxygen through the capillaries. As it occurred in external respiration, diffusion will once again occur in internal respiration. Th oxygen from the capillaries will diffuse into the cells and the carbon dioxide will diffuse into the capillaries (making it oxygen poor blood) and is returned to the right side of the heart and external respiration begins once again.
Oxygen poor blood travels through the pulmonary circuit which carries the blood away from the right side of the heart and towards the lungs. When we inhale our lungs (alveoli) fill with a higher level of Oxygen, and lower level of Carbon Dioxide. While the blood is in the lungs (alveoli) it becomes oxygen rich. After the blood is oxygenated it leaves the lungs and travels back to the heart (left side) where it is then distributed to different parts of the body while the carbon dioxide is released from the body when we exhale.
Internal Respiration: Is the exchange of gases that occurs between the blood and tissues. As the blood continues to travel through the body it reaches the capillaries. Cells receive oxygen through the capillaries. As it occurred in external respiration, diffusion will once again occur in internal respiration. Th oxygen from the capillaries will diffuse into the cells and the carbon dioxide will diffuse into the capillaries (making it oxygen poor blood) and is returned to the right side of the heart and external respiration begins once again.