How does the material move from respiratory system to circular system?

Materials do not directly move from the respiratory system to the circulatory system. The respiratory system facilitates the exchange of oxygen and carbon dioxide between the lungs and the bloodstream, while the circulatory system transports substances throughout the body.

Here's how oxygen and carbon dioxide are exchanged between the respiratory and circulatory systems:

1. Inhalation: During inhalation, air enters the lungs through the nose or mouth. The air passes through the trachea and bronchi and reaches the alveoli, which are tiny air sacs in the lungs where gas exchange occurs.

2. Diffusion of Oxygen and Carbon Dioxide: In the alveoli, oxygen from the inhaled air diffuses across the thin alveolar walls and into the bloodstream. Simultaneously, carbon dioxide, a waste product of metabolism, diffuses out of the bloodstream and into the alveoli.

3. Transport by Hemoglobin: Once oxygen enters the bloodstream, it binds to hemoglobin, a protein found in red blood cells. Hemoglobin carries oxygen to various tissues and cells throughout the body. At the same time, carbon dioxide is transported back to the lungs by hemoglobin.

4. Exhalation: The exchange process continues until exhalation occurs. During exhalation, the carbon dioxide-rich air is expelled from the lungs through the trachea and out of the body through the nose or mouth.

So, while the respiratory system facilitates the exchange of oxygen and carbon dioxide, it does not directly move materials to the circulatory system. Instead, the circulatory system, composed of the heart, blood vessels, and blood, transports gases, nutrients, hormones, and waste products throughout the body, including the exchange gases from the respiratory system.