Question

Why respiration is regarded as a catabolic process?

Answer 1

Respiration is the movement of oxygen from the outside environment to the cells within tissues, as well as the removal of carbon dioxide in the opposite direction, according to physiology.

Complete answer:
Metabolism is divided into two major components: anabolism and catabolism. Catabolism is the action of a group of metabolic pathways that breaks down molecules into smaller units that are then oxidised for energy or used in other anabolic reactions.
Large molecules such as polysaccharides, lipids, nucleic acids, and proteins are broken down into smaller units such as monosaccharides, fatty acids, nucleotides, and amino acids.
Cellular breathing is a catabolic mechanism that breaks down glucose to release a cell's available energy. Cellular respiration, like all catabolic processes, releases energy that can be harnessed and used in the cell via other reactions.
We breathe in oxygen-rich air and expel carbon dioxide-rich air while breathing. As we breathe in, oxygen-rich air is carried to all parts of our bodies and, eventually, to each cell. With the help of oxygen, the food, which contains glucose, is broken down inside the cell into carbon dioxide and water. Respiration is the process by which glucose is broken down to release energy that our bodies can use to perform daily tasks such as walking, sitting, or even thinking.
Cellular respiration is classified into two types: aerobic respiration and anaerobic respiration. Aerobic respiration requires oxygen, whereas aerobic respiration does not, but both are examples of catabolic reactions.

Note:
Hydrolysis is frequently used in catabolic reactions to break chemical bonds within larger molecules, resulting in the release of energy. Adenosine triphosphate (ATP) molecules absorb approximately $40\%$ of the energy released. The rest of the catabolic energy is released as heat energy, which is absorbed by body tissues and fluids.