division of cells that already exist (pre-existing cells). The environment outside the cell is separated from the cytoplasm inside the cell by the cell membrane...

Stem cells are cells of the body (somatic cells) which can divide and become differentiated. When an organism grows, stem cells specialize, and take specific...

A cell wall is the outer part of a cell in plants, bacteria, fungi, algae, and some archaea. Cell walls protect cells from damage. They also help keep...

Cell division is how a cell, called the parent cell, divides into two cells, called daughter cells. When the cell divides, everything inside it divides...

The cell nucleus (plural: cell nuclei) contains the cell's genes and controls the cell's growth and reproduction. It has a double layered nuclear membrane...

inside of cells from the outside. In all cells, the cell membrane separates the cytoplasm inside the cell from its surroundings. Animal cells are contained...

B cells are lymphocytes, a type of white blood cell. Once the B cell is activated, it turns into a plasma cell, and starts producing antibodies. They are...

cell becomes a more specialized cell type. It is part of developmental biology. Different tissues have different kinds of organelles inside the cells...

cells to destroy the viruses or bad cells. T-cells can either help make more B-cells, or kill cells with antibodies. Natural killer cells kill cells in...

Cell biology is the study of how living cells work. This includes the structure and function of the cell organelles, and the carbon-based molecules which...

where T cells mature. Cytotoxic T cells (Tc cells) Helper T cells, (Th cells) Regulatory T cells (Treg cells), used to be called suppressor T cells Natural...

submarines require very large batteries. Simple cell Dry cell Wet cell Fuel cell Solar cell Electric cell An extremely important class of oxidation and...

In cell biology, a receptor is a special structure that can be found in cell membranes. These are made of protein molecules such as glycoproteins. Receptors...

Sickle cell anaemia is a genetic disease. It affects red blood cells. It changes the cells from flexible disks into rigid crescents. When many red cells take...

This cell is also known as electrochemical cell. The simple electrical cells were first developed in 1800s. They are also called galvanic cells, because...

Cell growth (or interphase) is shorthand for the idea of "growth in cell populations" by means of cell reproduction. It is the stage which cells are preparing...

blood cell is any cell of any type found in blood. There are three main types of blood cells in mammals: Red blood cell-carries oxygen White blood cell-kills...

Red blood cells (also known as RBCs, red blood corpuscles or erythrocytes) are cells in the blood which transport oxygen. In women, there are about 4.8...

WWE Hell in a Cell was a yearly professional wrestling pay-per-view (PPV) and livestreaming event made by WWE. The first event took place in 2009, replacing...

Squamous cell carcinomas (SCCs), also known as epidermoid carcinomas, is made up of a number of different types of cancer that result from squamous cells. These...

A fuel cell makes electricity using the energy released by mixing fuel with air, a reaction which creates water and sometimes also carbon dioxide. The...

plants have cells. Plant cells have a nucleus with chromosomes and DNA, and they have mitochondria. Those are common to all eukaryotic cells. But in some...

Cell theory is the historic scientific theory, now accepted by everyone, that living organisms are made up of cells. Cells are the basic unit of structure...

of turning stem cells into sperm. It was also called the "mother cell." The cell also helps in the creation of stem cells. Sertoli cells get their name...

A neuron (or neurone) is a nerve cell which uses electrical impulses to carry out their purpose. Neurons are the basic units of our nervous system. Their...

Sperm are the male reproductive cells. Most animals and plants use sperm to reproduce. They have different ways of making and releasing the sperm. In...

A mast cell is like a white blood cell (leukocyte) which lives and acts in tissues. It is made in bone marrow, and matures in tissues, where it defends...

A clandestine cell system is a way of organising a group of people so that it is kept secret. This is so the group are better able to resist people entering...

Dendritic cells (DCs) are white blood cells forming part of the mammalian immune system. They process antigen material from pathogens and put it on their...

Solar cells are semiconductor devices that convert light to electricity. They have many applications. They have long been used in situations where electrical...

All the cells in the body of an organism are somatic cells, except for the haploid gametes (sex cells like eggs and sperm) and other cells involved in...

organism with complex cells, or a single cell with complex structures. In these cells the genetic material is organized in the cell nucleus. Animals, plants...

In cell biology, an organelle is a part of a cell that does a specific job. Organelles usually have a plasma membrane around them. Most of the cell's organelles...

Primary cells Zinc-carbon cells, also known as Leclanche cells Alkaline cells Lithium cells Mercury cells Silver oxide cell Secondary cells Nickel-cadmium...

Tissue culture or cell culture is a way to grow cells in a laboratory. Cells are taken, and put into in a flask or Petri dish. They can be grown on a growth...

helper cells are a kind of lymphocyte blood cell, produced in the thymus. They do not kill or eat bacteria. What they do is to help other immune cells target...

structure is almost constant. We recognize 3 cells: the Hadley cell, the Ferrel cell and the Polar cell. The movement of air masses is influenced by coriolis...

Natural killer cells (or NK cells) are a type of lymphocyte critical to the innate immune system. NK cells provide a rapid response to cells infected by...

A primary cell is a battery that is made to be used one time only. It cannot be recharged. Once all the power is used up, the battery must be thrown away...

A cytotoxic T cell is a type of white blood cell. It is a T lymphocyte which kills cancer cells, cells infected with viruses, or cells that are damaged...

(Latin: "egg", plural: ova) is the name for the haploid female reproductive cell, or gamete. Both animals and land plants (embryophytes) produce ova. Ova...

Cell (2006) is a novel by Stephen King. The book was published on January 24, 2006. It is about Clayton Riddell, an artist from New England who tries to...

Apoptosis is the controlled death of a cell. It is an important part of tissue development. For example, during limb development in a foetus, apoptosis...

killer T cells (NKT) are cells formed from small lymphocytes. They are a type of T cell, and are different from natural killer cells (NK). NKT cells are important...

Cell junctions join cells in some biological tissues. They have long protein chains, The proteins keep connections between neighbouring cells or between...

A gamete (or germ cell, germ-line cells, pluralː gametes) is a sex cell which fuses with another gamete during fertilization. This happens in organisms...

A wet cell is a cell that contains a liquid electrolyte. Most batteries have a paste electrolyte. Car batteries have a liquid electrolyte. They are inconvenient...

In four dimensional geometry, a 16-cell, is a regular convex polychoron, or polytope existing in four dimensions. It is also known as the hexadecachoron...

A prison cell, jail cell or holding cell is a small room in which one or more prisoners are held. There are two types of jail cells. One type is a holding...

Brain cells are a group of cells that includes neurons and glial cells. The neurons perform the tasks, and the glial cells look after the neurons. Current...