SSC MTS EXAM

Detailed explanation-1: -Inside the red blood cell, oxygen reacts chemically with hemoglobin and is transported by both free and hemoglobin-facilitated diffusion. Oxygen diffuses through the cell membrane and is transported in blood plasma by free diffusion and by convection.

Detailed explanation-2: -Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.

Detailed explanation-3: -Answer and Explanation: The direction of diffusion of gases at the alveoli of the lungs is oxygen into blood and carbon dioxide out of blood. Alveoli are the terminal air spaces of the respiratory system.