The site of cellular respiration in animal cell is

In animal cells, the mitochondria serve as the primary site for cellular respiration, specifically aerobic respiration. While the initial stage of glucose breakdown, known as glycolysis, occurs in the cytoplasm, the subsequent stages that release the majority of energy happen within the mitochondria [1]. These double-membrane organelles are often referred to as the 'powerhouse' or 'power plants' of the cell because they convert energy from organic compounds into adenosine triphosphate (ATP), the cell's main energy currency. Other organelles mentioned have distinct functions: ribosomes are the sites of protein synthesis, the endoplasmic reticulum is involved in protein and lipid transport, and lysosomes handle cellular digestion. Therefore, for the complete process of aerobic respiration and efficient ATP production in eukaryotic animal cells, the mitochondria are the essential site.

Sources

1. [1] https://www.sciencedirect.com/topics/psychology/cellular-respiration