what cell has abundance of mitochondrion?

Skeleton muscle cells should contain most abundance of mitochondria. The number of mitochondria in a cell varies with its matabolic activity. Therefore, the number of cristae in a mitrochondria increases in metabolically active cell. This is because respiratory enzymes are located there. Mitochondria function as a site for anaeobric respiration where ATP hydrolzed into ADP. That's why skeleton mucle cells have most abundance of mitochondria.

muscle cell 同 liver cell都應該唔少

因為兩者都需要大量能量去運作
(mitochondria 就好似小型發電機咁樣去提供能量)

Skeletal muscle cell.

Its abundance of mitochondria helps release more energy through aerobic respiration for the movement of the body.