A Wisdom Archive on tissue

In biology, a trait or character is a genetically inherited feature of an organism. As synonym for trait can be sometimes used the term phenotype; the difference is that this second term can also indicate the total physical appearance or constitution. Trait - Definition. A trait may be any single feature or quantifiable measurement of an organism. However, the most useful traits for genetic analysis are present in different forms in different individuals. A visible tra ... Including:

• Trait - Definition
• Trait - Environmental origin
• Trait - Genetic origin of traits in diploid organisms
• Trait - Mendelian expression of genes in diploid organisms
• Trait - Biochemistry of dominance and extensions to expression of traits

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A sinus is a pouch or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. The term is applied to a large number and variety of structures in animals, such as:- The air cavities in the cranial bones, especially those near the nose and connecting to it. These are the paranasal sinuses and are usually what is meant when a person's "sinuses" are referred to. A dilated portion of a blood vein, such as inside the braincase. A chronically infected tract such as a fistula. Another name for the hemocoel, a space in organisms with open circu ...

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Effleurage is a massage stroke used to warm up the muscle before deep tissue work using petrissage. This is as soothing, stroking movement used at the beginning and the end of the facial massage. It is also used as a linking move between the different strokes and movements. Effleurage can be either firm or light without dragging the skin and is perform using either the padded parts of the finger tips ...

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A toxin (Gk. toxikon "(poison) for use on arrows,") is a poisonous substance produced by living cells or organisms. Toxins are nearly always proteins that are capable of causing disease on contact or absorption with body tissues by interacting with biological macromolecules such as enzymes or cellular receptors. Toxins vary greatly in their severity, ranging from usually minor and acute (as in a bee sting) to almost immediately deadly (as in botulinum toxin). Biotoxins vary greatly in purpose and mechanism, and can be hi ... Including:

• Toxin - Use
• Toxin - Non-technical usage

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Tumor (American English) or tumour (British English) originally means "swelling", and is sometimes still used with that meaning. Tumor meaning swelling is one of the five classical characteristics of inflammation. However, the term is now primarily used to denote abnormal growth of tissue. This growth can be either malignant or benign. It is similar in meaning to a neoplasm. Tumor - Tumor Types: Malignant vs. benign. Malignant tumors are called cancer. Cancer has the potential to invade and destroy n ... Including:

• Tumor - Tumor Types: Malignant vs. benign
• Tumor - Tumor Types
• Tumor - Causes
• Tumor - Similar structures

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The spleen is a ductless, vertebrate gland that is not necessary for life but is closely associated with the circulatory system, where it functions in the destruction of old red blood cells and removal of other debris from the bloodstream, and also in holding a reservoir of blood. It is regarded as one of the centres of activity of the reticuloendothelial system. Until recently, the purpose of the spleen was not known. It is increasingly recognised that its absence predisposes to certain infections. Spleen - Anatomy. ... Including:

• Spleen - Anatomy
• Spleen - Disorders
• Spleen - Absence
• Spleen - Etymology and cultural views

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A trait may be any single feature or quantifiable measurement of an organism. However, the most useful traits for genetic analysis are present in different forms in different individuals. A visible trait is the final product of many molecular and biochemical processes. In most cases, information starts with DNA traveling to RNA and finally to protein (ultimately affecting organism structure and function). This is the Central Dogma of molecular ...

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Bone fracture - Closed vs. open. In medicine, fractures are classified as closed or open (compound) and simple or multi-fragmentary (formerly comminuted). Closed fractures are those in which the skin is intact, while open (compound) fractures involve wounds that communicate with the fracture and may expose bone to contamination. Open injuries carry an elevated risk of infection; they require antibiotic treatment and usually urgent surgical treatment (debridement). T ...

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In contrast to tumors originating elsewhere in the body, differentiating primary "brain tumors"—these are the true brain tumors, arising exclusively from cells normally present in the brain itself—into benign and malignant is of relative and limited clinical value, since even histologically-benign tumors grow by infiltration of healthy brain tissue and, in time, tend to transform into malignant forms (anaplastic degeneration). True benign intracranial tumors arise mainly from the meninges (meningiomas; about 95% are benign), pituitary gland (pituitary adenomas) and the myelin sheath of cranial nerves (n ...

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The body is received at a medical examiner's office or hospital in a body bag or evidence sheet. A brand new body bag is used for each body to ensure that only evidence from that body is contained within the bag. Evidence sheets are an alternate way to transport the body. An evidence sheet is a sterile sheet that the body is covered in when it is moved. If it is believed there may be any significant residue on the hands, for instance gunpowder, a separate paper sack is put around eac ...

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The primary symptom of asbestosis is generally the slow, insidious onset of shortness of breath on exertion. In severe, advanced cases, this may lead to respiratory failure. Coughing is not usually a typical symptom, unless the patient has other, concomitant respiratory tract diseases. People with extensive occupational exposure to the mining, manufacturing, handling or removal of asbestos are at risk of developing asbestosis. There is also an increased risk of lung cancer and mesothelioma. This risk is related to the total dose of asbesto ...

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Biotoxins are used in nature for two primary reasons: Predation (spider, snake, jellyfish, wasp) Defense (poison dart frog, deadly nightshade, honeybee, wasp) Some of the more well known biotoxins include: Hemotoxin targets and destroys red bloodcells, and is transmitted through the bloodstream. Necrotoxin causes necrosis (i.e., death) in the cells it encounters and destroys all types of tissue. Necrotoxin spreads through the bloodstream, but infects all tissues. In huma ...

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All cells whether prokaryotic or eukaryotic have a membrane, which envelopes the cell, separates its interior from its environment, controls what moves in and out, and maintains the electric potential of the cell. Inside the membrane, a salty cytoplasm takes up most of the cell volume. All cells possess DNA, the hereditary material of genes and RNA, which contain the information necessary to build various proteins such as enzymes, the cell's primary machinery. There are also other kinds of biomolecules in cells. This article will list these primary compo ...

Read more here: » Cell biology: Encyclopedia II - Cell biology - Subcellular components

The ulcers are categorized into four stages, subject to size and depth: Stage I is the most superficial, with only superficial irritation, Stage II is blistering of the skin, Stage III involves the full thickness of the skin, and is often complicated by infection, Stage IV is the deepest, usually extending into the muscle, tendon or even bone. With higher stages, healing time is prolonged. While about 75% of stage 2 ulcers heal within 8 weeks, only 62% of stage 4 pressure ulcers ever heal, and only 52% h ...

Read more here: » Bedsore: Encyclopedia II - Bedsore - Classification