Living organisms require energy to perform cellular activities. The energy comes from breakdown of food in respiration. Carbon (IV) oxide is a by-product of respiration and its accumulation in cells… Read More »GASEOUS EXCHANGE IN PLANTS AND ANIMALS
All animals take in oxygen for oxidation of organic compounds to provide energy for cellular activities. The carbon (IV) oxide produced as a by-product is harmful to cells and has… Read More »GASEOUS EXCHANGE IN ANIMALS
An adult frog lives on land but goes back into the water during the breeding season. A frog uses three different respiratory surfaces. These are the skin, buccal cavity and… Read More »GASEOUS EXCHANGE IN AN AMPHIBIAN – FROG
The breathing system of a mammal consists of a pair of lungs which are thin-walled elastic sacs lying in the thoracic cavity. The thoracic cavity consists of vertebrae, sternum, ribs… Read More »GASEOUS EXCHANGE IN A MAMMAL – HUMAN
Gaseous exchange takes place by diffusion. The structure of the leaf is adapted for gaseous exchange by having intercellular spaces that are filled. These are many and large in the… Read More »GASEOUS EXCHANGE IN LEAVES OF TERRESTRIAL PLANTS
Gaseous exchange in insects e.g., grasshopper takes place across a system of tubes penetrating into the body known as the tracheal system. The main trachea communicate with atmosphere through tiny… Read More »GASEOUS EXCHANGE IN INSECTS