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 مصطلحات في علم الانسجه

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عدد المساهمات : 285
تاريخ التسجيل : 18/03/2011

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مُساهمةموضوع: مصطلحات في علم الانسجه   مصطلحات في علم الانسجه I_icon_minitimeالأربعاء مارس 30, 2011 4:36 pm

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احببت ان انقل لكم هاذاه المصطلحات المستخدمه في علم الانسجه وبيان معناها العلمي


Biomedical Scientist
Technical staff, qualified in appropriate sciences, who work in pathology laboratories to prepare materials for subsequent diagnostic reporting by pathologists.

Block
Histology samples are stored permanently in blocks of paraffin wax. This keeps the sample stable and also holds it solidly when thin sections must be cut from it.

Cut Up
A colloquial term used, in British clinical histopathology laboratories, to describe a session of dissection. This is usually performed by a pathologist but may also be done by a senior technician

Cutting
More correctly known as sectioning or microtomy, this is the process of slicing very thin sections of material from the surface of a histology block. The sections are typically between 3 and 5 µm in thickness.

Cytology
The study of cells. This especially applies to cells not held in a sctructural matrix such as plant or animal tissues - therefore, fluids containing cells.

Cytopathology
The study of diseased cells, usually held in fluids or exfoliated from surfaces. The best known example of this is the screening of women, for cervical cancer, by use of cervical smears.

Eosin
An acidic dye which binds with basic tissue components (membranes, cytoplasm etc.). Widely used in "H&E" staining, the most common morphological stain in histology and cytology. In these preparations, eosin stains all cellular components, except the nuclei, in shades of red and pink.

Haematoxylin
A basic dye which binds with acidic tissue components (nucleic acids such as DNA). Widely used in "H&E" staining, the most common morphological stain in histology and cytology. In these preparations, haematoxylin stains cell nuclei in shades of blue and purple.

Histology
Histology is the study of cellular tissue architecture using microscopy. This includes work on both plant and animal species.
Histopathology
Adding the fragment 'patho' into histology gives us the study of diseases in tissues. In terms of clinical laboratories, this is the more correct term to use since we aim to locate and classify diseases of the tissues. In practice, this most commonly means cancers.

Immunohistochemistry
Known as 'Immuno' for short, this is the process of building complexes on molecular or proteinaceous targets within cells. These complexes "amplify" the appearance of the target molecule. This means the complex is large enough to be stained and viewed down the microscope. This method allows easier classification of cancers - especially those that look similar morphologically.
Microscope
A device used for viewing objects too small to be resolved by the human eye. In this case, individual cells in pathological preparations, presented on glass slides.

Microtome
A machine used for cutting very thin slices of tissue from plant or animal specimens. It can be thought of as a much more precise and delicate version of a butcher's meat slicing machine.

Histopathologist
A medical doctor who, after qualifying in general medicine, has taken a course of studies in order to specialise in the diagnosis of diseases through the study of pathological preparations. A histopathologist may also conduct post-mortem examinations (autopsy).

Slide
Glass microscope slides which are used to hold permanent or temporary pathology preparations for viewing down a microscope
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