Respiration

• The exchange of gases occurs in the alveoli, which are small air sacs in the lungs.
• Oxygen diffuses from the alveoli into the bloodstream through thin walls called capillaries.
• Gas exchange occurs at the alveoli, which are tiny air sacs located within the lungs.
• The respiratory system is responsible for the exchange of gases between the body's cells and the external environment.
• Aerobic respiration, which requires oxygen, produces the most ATP and is the primary respiratory process in humans and other animals.
• The process of diffusion allows oxygen and carbon dioxide to move from an area of high concentration to an area of low concentration.
• Respiratory rate refers to the number of breaths taken per minute.