ANATOMY

Detailed explanation-1: -Internal respiration is the process of diffusing oxygen from the blood, into the interstitial fluid and into the cells. Waste and carbon dioxide are also diffused the other direction, from the cells to the blood.

Detailed explanation-2: -In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls. Once in the bloodstream, oxygen gets picked up by the hemoglobin in red blood cells.

Detailed explanation-3: -The exchange of dissolved gases between the blood and the interstitial fluids in peripheral tissues is called internal respiration. Internal respiration is the exchange of gases between the blood in systemic capillaries and the tissue cells. Typically blood loses oxygen and gains carbon dioxide.

Detailed explanation-4: -It generally refers to the exchange of gases mainly oxygen and carbon dioxide, which occurs between the blood and cells. During the internal respiration process, oxygen binds to the haemoglobin in alveolar tissues and gets transported to various parts of body tissues.

Detailed explanation-5: -External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.