Tissue
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  Tissue



Tissue

    Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.

RELATED TERMS
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Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.

Histology
The study of the structure and behavior of cells and body tissues, usually involving microscopic examination of tissue slices.

Disease
Illness or sickness often characterized by typical patient problems (symptoms) and physical findings (signs). Disruption sequence: The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.

Optical
Having to do with vision.

Microscope
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. The science of investigating small objects using such an instrument is called microscopy, and the term microscopic means minute or very small, not easily visible with the unaided eye. In other words, requiring a microscope to examine.

Electron
Stable elementary particles having the smallest known negative charge, present in all elements; also called negatrons. Positively charged electrons are called positrons. The numbers, energies and arrangement of electrons around atomic nuclei determine the chemical identities of elements. Beams of electrons are called CATHODE RAYS or BETA RAYS, the latter being a high-energy biproduct of nuclear decay.

Microscopy
Investigation of minute objects by means of a microscope.

Immunofluorescence
Technique allowing the visualisation of a specific protein in cells or tissue sections (prepared from a biopsy) by binding a specific antibody conjugated to a fluorescent substrate.



SIMILAR TERMS
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Tissue culture
See culture.

Tissue Plasminogen Activator (t-PA)
A clot dissolving agent that is injected directly into a clogged artery to break up a blood clot. If used within 3 hours after the start of a stroke, brain damage may be avoided.

Tissue plasminogen activator (TPA)
A medication used to dissolve blood clots.

Tissue Typing
A test that evaluates the compatibility or closeness of tissue between the organ donor and recipient.



PREVIOUS AND NEXT TERMS
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Toxin
A poison formed as a specific secretion product in the metabolism of a vegetable or animal organism as distinguished from inorganic poisons. Such poisons can also be manufactured by synthetic processes.

Thrombocyte
Also known as platelets because of their small plate-like appearance. Their chief function is to initiate blood clotting when injury occurs.

Tissue

Thymine
A nitrogenous base, one member of the base pair AT (adenine-thymine).

Telomer
A small segment at the end of nuclear DNA that becomes shorter with every replication of the DNA. DNA will no longer replicate beyond a certain point of telomere reduction.

Testosterone
The hormone that promotes the building of muscle mass in males and libido in both sexes.

Thymus
The gland responsible for the production of certain white cells known as T-lymphocytes that are important for immune function. The thymus is very sensitive to excess cortisol.

Thyroid
The gland in the throat that synthesizes thyroid hormones that affect metabolism.

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