Which type of cell ingests bacteria and debris?

• A. Neuron
• B. Erythrocyte
• C. Myocyte
• D. Phagocyte

Answer: (D)

Phagocytes are the cells that ingest and destroy bacteria and debris. They sweep up pathogens and refuse material, engulfing them into a membrane-bound compartment called a phagosome. This phagosome then fuses with lysosomes to form a phagolysosome, where enzymes and reactive molecules break down the invaders. This process, known as phagocytosis, is a key part of the body's innate defense and cleanup system.

Other cell types listed don’t perform this task. Neurons transmit electrical signals, erythrocytes carry oxygen and lack the machinery for digestion, and myocytes are involved in muscle contraction. So the function of ingesting bacteria and debris best fits phagocytes.