What are cells?

Some articles on cells, cell:

Sponge - Distinguishing Features
... intake and outlet openings connected by chambers lined with choanocytes, cells with whip-like flagella ... All known living sponges can remold their bodies, as most types of their cells can move within their bodies and a few can change from one type to another ... bodies consist of a non-living jelly-like mass sandwiched between two main layers of cells ...
Cerebellum - Structure - Compartmentalization
... structure came from studies of the receptive fields of cells in various parts of the cerebellum cortex ... A microzone is defined as a group of Purkinje cells all having the same somatotopic receptive field ... Microzones were found to contain on the order of 1000 Purkinje cells each, arranged in a long, narrow strip, oriented perpendicular to the cortical folds ...
Sponge - Vital Functions - Reproduction - Sexual
... Each egg generally acquires a yolk by consuming "nurse cells" ... There are four types of larvae, but all are balls of cells with an outer layer of cells whose flagellae or cilia enable the larvae to move ... Most of the cells transform into archeocytes and then into the types appropriate for their locations in a miniature adult sponge ...
Pseudopodia
... πόδια "feet") are temporary projections of eukaryotic cells ... Cells that possess this faculty are generally referred to as amoeboids ... Filaments near the cell's end interact with myosin which causes contraction ...
Sponge - Vital Functions - "Immune" System
... In a few marine species, gray cells play the leading role in rejection of foreign material ... a chemical that stops movement of other cells in the affected area, thus preventing the intruder from using the sponge's internal transport systems ... If the intrusion persists, the grey cells concentrate in the area and release toxins that kill all cells in the area ...

Famous quotes containing the word cells:

    Madness is locked beneath. It goes into tissues, is swallowed by the cells. The cells go mad. Cancer is their flag. Cancer is the growth of madness denied.
    Norman Mailer (b. 1923)

    The twelve Cells for Incorrigibles ... are also carved out of the solid rock hill. On the walls of one of the cells human “liberty” is clearly inscribed, with the “liberty” in significant quotation marks.
    —Administration in the State of Ariz, U.S. public relief program (1935-1943)

    If I’d written all the truth I knew for the past ten years, about 600 people—including me—would be rotting in prison cells from Rio to Seattle today. Absolute truth is a very rare and dangerous commodity in the context of professional journalism.
    Hunter S. Thompson (b. 1939)