What is Respiration?
Respiration is one of the important chemical processes in all the living organisms. This process occurs either in the presence of oxygen or in the absence of Oxygen
For example, human beings undergo the process of respiration by inhaling oxygen gas and exhaling carbon dioxide gas. Many other living organisms including plants and animals undergo respiration process to obtain energy for their metabolic activities.
The general diagram of this process is as shown below-
Types of Respiration
Respiration is of two types, aerobic respiration, and anaerobic respiration.
Aerobic Respiration: It is the process of cellular respiration that takes place in the presence of oxygen gas to produce energy from food. This type of respiration is common in most of the plants and animals, birds, humans, and other mammals. In this process, water and carbon dioxide are produced as end products.
Anaerobic Respiration: It is a process which takes place in the absence of oxygen gas. In this process, the energy is obtained by the breakdown of glucose in the absence of oxygen. One of the best examples of anaerobic respiration is the process of fermentation in yeast.
Let us learn in detail about the Aerobic Respiration
Aerobic respiration is a process in which the food glucose is converted into energy in the presence of oxygen. The chemical equation of aerobic respiration is as given below-
Glucose + Oxygen = Carbon-dioxide + Water + Energy
According to the above-given chemical equation, energy is released by the splitting the glucose molecules with the help of oxygen gas. At the end of the chemical reaction, energy, water molecules, and carbon dioxide gas are released as the by-products or end products of the reactions.
The 2900 kJ of energy is released during the process of breaking the glucose molecule and in turn, this energy is used to produce ATP – Adenosine Triphosphate molecules which are used by the system for various purposes.
Aerobic respiration process takes place in all multicellular organisms including animals, plants and other living organisms.
During the respiration process in plants, the oxygen gas enters the plant cells through the stomata, which is found in the epidermis of leaves and stem of a plant. With the help of the photosynthesis process, all green plants synthesize their food and thus releases energy.
The below-given chemical equation describes the complete process of photosynthesis or the aerobic respiration in plants.
Carbon-dioxide + Water = Glucose + Oxygen
Stay tuned with BYJU’S to learn more in detail about Respiration, its organs and different types of Respiration.