Biology

Medulla Oblongata Definition Medulla oblongata is the lowermost portion of the brainstem in humans and other mammals. It is important in the reflex control of…

Eosinophil Definition Eosinophil is a type of white blood cell containing cytoplasmic granules that are easily stained by eosin or other acid dyes. It is…

Progenitor Cell Definition Progenitor cell is a cell that originates from a stem cell and differentiates into a more specialized cell. A progenitor cell is…

Neurotrophin Definition Neurotrophins (neurotrophic factors) are proteins which induce the survival of neurons and are found in the blood stream. Neurotrophins are capable of signaling…

Schwann cell Definition Schwann cell is any of the cells that cover the axons in the peripheral nervous system and form the myelin sheath. It…

Myelin Definition Myelin is a whitish, fatty substance that forms a sheath around many vertebrate nerve fibers. Myelin insulates the nerves and permits the rapid…

Neuroglia Definition Neuroglia is the delicate connective tissue which supports and binds together the nervous elements of the central nervous system. One part of it,…

Ependyma Definition Ependyma is the membrane lining the ventricles of the brain and the central canal of the spinal cord. It is one of the…

Ventricular System Definition Ventricular system is comprised of a series of four cavities in the brain that produce cerebrospinal fluid (CSF). It is a series…

Cerebrospinal Fluid Definition Cerebrospinal fluid (CSF) is the clear fluid that fills the cavities of the brain and covers the surfaces of the brain and…

Granzyme Definition Granzyme is a group of serine proteases that are released by the body’s natural killer cells and cytotoxic T-cells. When cells become infected…

Electrophoresis Definition Electrophoresis is the migration of electrically charged molecules through a fluid or gel under the influence of an electric field. Electrophoresis is used…