how does transportation of oxygen and carbon dioxide takes place in large body sized animals and in human being?
please answer in detail
Answers
Oxygen and Carbon dioxide is transported in large bodies and in humans by the blood.
Explanation:
- When we breathe in, the oxygen reaches from our mouth to the lungs. The alveoli are the regions of the lungs where exchange of gases takes place between the lungs and the bloods.
- The oxygen is taken in by the capillaries from the lungs and the deoxygenated blood or carbon dioxide is released by the blood capillaries in the alveoli.
- The capillaries will supply blood to all other parts of the body.
- The carbon dioxide will move out of the body when we exhale.
Transportation of oxygen and carbon dioxide
Explanation:
The structure of any respiratory surface (lungs, gills, tracheae), maximizes its surface area to increase gas diffusion. Because of the enormous number of alveoli (approximately 300 million in each human lung), the surface area of the lung is very large (75 m2). Having such a large surface area increases the amount of gas that can diffuse into and out of the lungs. Respiratory surfaces are also extremely thin (typically only one cell thick), minimizing the distance gas must diffuse across the surface.
Gas exchange during respiration occurs primarily through diffusion. Diffusion is a process in which transport is driven by a concentration gradient. Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs. The air in the lungs has a higher concentration of oxygen than that of oxygen-depleted blood and a lower concentration of carbon dioxide. This concentration gradient allows for gas exchange during respiration.
Blood helps carry oxygen to the body cells where the diffusion occurs again. Carbon dioxide from the body cells are carried back to the lungs from the cells and thus expired out.