All living things are made of cells which are differentiated to perform different functions. Substances move into or out of the cell and enzymes are catalysts contributing to cell metabolism.

Cells are the smallest unit of life. Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself.

The immune system is the body’s tool for preventing or limiting infection. Its complex network of cells, organs, proteins, and tissues enables the immune system to defend the body from pathogens.

While brain cells do the heavy lifting in the nervous system, it's the glia that provide nutrients, clean up waste, and protect neurons from harm. Beijing insisted on Tuesday that it had shared ...

Our blood consists of many cell types that develop through different stages from a precursor type—the blood stem cell. An ...

The Organ-on-a-Chip (OOAC) technology simulates various organ systems depending on the specific cell types seeded onto the ...

Although the roles of antigen-presenting cells, in particular dendritic ... Treating the mucosal immune system as a global organ that affects immune development and has an intimate relationship ...

What cells and specialized organs make such crypsis possible for ... While the individual components of the camouflage system have received extensive study and are relatively well understood ...

Our blood consists of many cell types that develop through different stages from a precursor type -- the blood stem cell. An international research team has now investigated the developmental pathways ...