According to the National Library of Medicine, the site of blood cell formation is the bone marrow. Kimball's Biology Pages states there are two types of blood cells: red blood cells, or erythrocytes, and white blood cel... More »

The main function of white blood cells is to help protect the human body from infection as well as other foreign materials. White blood cells are also known as leukocytes, and they develop in bone marrow from stem cells. More »

White blood cells emerge from the bloodstream through capillaries and engage harmful molecules by either engulfing them or poisoning them. There are different types of white blood cells, which divide between them various... More »

The fastest replicating human cells are red blood cells found in the bone marrow. These cells divide at a rate of two million per second, and the process is known as "mitosis." More »

White blood cells are produced within the bones in a substance called bone marrow, according to the Health Encyclopedia of the University of Rochester Medical Center. White blood cells only account for around 1 percent o... More »

Egg cells have adaptations in formation, structure and genetic makeup that enable them to function. Egg cells have similar genetic composition to sperm, but their physical structure and initial formation are unique. More »

The vacuole is the site where a cell membrane comes into contact with water. A vacuole, which is an organelle found in a cell's cytoplasm, has a membrane called a tonoplast that surrounds it. The function of this membran... More »