Red blood cell and White blood cell

Red blood cell noun - A mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus.

White blood cell and red blood cell are semantically related. In some cases you can use "White blood cell" instead a noun phrase "Red blood cell".

White blood cell noun - Blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system.

Red blood cell and white blood cell are semantically related. You can use "Red blood cell" instead a noun phrase "White blood cell".