Folds of the inner membrane of a mitochondrion. These folds increase the available surface area of the inner membrane where cellular respiration occurs.

A membrane-bound fluid filled organelle of eukaryote cells

A globular protein found in all plant and animal cells that can polymerize into microfilaments. The globular form is called G-actin, the polymerized form F-actin. Actin is important in organelle movem [..]

Immunity dependent upon lymphocytes having been exposed to specific antigens. It can result in both cell-mediated killing of disease causing entities such as microbes and cancer cells and also the pro [..]

Acronym for acquired immunodeficiency syndrome, an immune system disruption caused by infection with the human immunodeficiency virus

An immune system response to external substances including pollen, dust mite feces, food, and various chemicals. See more in Dust Mite

Disease caused by infection with parasitic amoebas

A polarizing filter used in microscopy and placed between the subject and the viewer. The analyzer is used in combination with a “polarizer” which is placed between the subject and the light source. W [..]

The mitotic stage when chromosomes move from the central metaphase plate toward the poles. Anaphase I is that stage within Meiosis I (reduction division). Anaphase II is that stage with Meiosis II. Se [..]

A general term meaning any microscopic organism. Read about the "Peeping Tom of Delft"