GASEOUS EXCHANGE AND RESPIRATION

GASEOUS EXCHANGE AND RESPIRATION

Gaseous exchange is the movement of oxygen and carbondioxide between the organism and its environment at the respiratory surfaces.

Oxygen goes in and carbon oxide goes out – These gases move in and out through diffusion.

Respiratory surfaces – These are surfaces on which gaseous exchange takes places.

In case of unicellular organisms, gaseous exchange usually takes place throughout the whole body i.e. the cell and the distance through which gases have to travel is small.

In large multicellular organisms there are well developed respiratory systems through which gases move in and out of the organism from and to the external environment.

Types of respiratory surfaces

Gaseous from shahzadebaujiti