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In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function.The name organelle comes from the idea that these structures are parts of cells, as organs are to the body, hence organelle, the suffix -elle being a diminutive.
A mature red blood cell has no mitochondria, [19] whereas a liver cell can have more than 2000. [20] [21] The mitochondrion is composed of compartments that carry out specialized functions. These compartments or regions include the outer membrane, intermembrane space, inner membrane, cristae, and matrix.
The cortex of a lymph node is the outer portion of the node, underneath the capsule and the subcapsular sinus. [17] It has an outer part and a deeper part known as the paracortex. [17] The outer cortex consists of groups of mainly inactivated B cells called follicles. [5] When activated, these may develop into what is called a germinal centre. [5]
The structural change after sound exposure in the Hensen's cells were observed by laser scanning confocal microscopy (LSCM), it showed that after sound exposure, the Hensen's cells moved towed the tunnel of Corti, most of the movement were found in the third row of outer hair cells around with outer part rotates, furthermore, the movement often ...
Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.
The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.
Glycoproteins on the membrane assist the cell in recognizing other cells, in order to exchange metabolites and form tissues. Other proteins on the plasma membrane allow attachment to the cytoskeleton and extracellular matrix; a function that maintains cell shape and fixes the location of membrane proteins. Enzymes that catalyze reactions are ...
The cerebral cortex, the outer layer of the cerebrum, plays a key role in memory, attention, perceptual awareness, thought, language, and consciousness. Cortical bone is the hard outer layer of bone; distinct from the spongy, inner cancellous bone tissue [2] Ovarian cortex is the outer layer of the ovary and contains the follicles.