Certain cells, such as mammalian red blood corpuscles, lack mitochondria for aerobic respiration and must depend on [[1]] metabolism.

In mammals, red blood cells (also known as erythrocytes) lack mitochondria, which are the cellular organelles responsible for aerobic respiration. 

Red blood cells are specialized cells that transport oxygen from the lungs to the tissues and organs, as well as carbon dioxide from the tissues and organs to the lungs. 

Red blood cells lack mitochondria and are unable to perform aerobic respiration and must rely on anaerobic metabolism to generate energy. 

The primary energy source for red blood cells, on the other hand, is glucose, which is metabolized via glycolysis, an anaerobic metabolic pathway that generates energy in the absence of oxygen.