User talk:Enas753

metaplasia
Read in another language Metaplasia Page issues Metaplasia (Greek: "change in form") is the reversible transformation of one differentiated cell type to another differentiated cell type. The change from one type of cell to another may be part of a normal maturation process, or caused by some sort of abnormal stimulus. In simplistic terms, it is as if the original cells are not robust enough to withstand their environment, so they transform into another cell type better suited to their environment. If the stimulus causing metaplasia is removed or ceases, tissues return to their normal pattern of differentiation. Metaplasia is not synonymous with dysplasia, and is not considered to be an actual cancer.[1] It is also contrasted with heteroplasia, which is the spontaneous abnormal growth of cytologic and histologic elements. Today, metaplastic changes are usually considered to be an early phase of carcinogenesis, specifically for those with a history of cancers or who are known to be susceptible to carcinogenic changes. Metaplastic change is often viewed as a premalignant condition that requires immediate intervention, either surgical or medical, because metaplasia is associated with cancer. Enas753 (talk) 12:28, 1 May 2018 (UTC)

apoptosis
Watch this page Read in another language Apoptosis Apoptosis (from Ancient Greek ἀπόπτωσις "falling off") is a process of programmed cell death that occurs in multicellular organisms.[2] Biochemical events lead to characteristic cell changes (morphology) and death. These changes include blebbing, cell shrinkage, nuclear fragmentation, chromatin condensation, chromosomal DNA fragmentation, and global[vague] mRNA decay. The average adult human loses between 50 and 70 billion cells each day due to apoptosis.[a] For an average human child between the ages of 8 and 14, approximately 20 to 30 billion cells die a day Enas753 (talk) 12:35, 1 May 2018 (UTC)

المقارنه بين الالتهاب الحاد و المزمن
Acute inflammation – starts rapidly (rapid onset) and quickly becomes severe. Signs and symptoms are only present for a few days, but in some cases may persist for a few weeks.

Examples of diseases, conditions, and situations which can result in acute inflammation include: acute bronchitis, infected ingrown toenail, sore throat from a cold or flu, a scratch/cut on the skin, exercise (especially intense training), acute appendicitis, acute dermatitis, acute tonsillitis, acute infective meningitis, acute sinusitis, or a blow.

Chronic inflammation – this means long-term inflammation, which can last for several months and even years. It can result from:

Failure to eliminate whatever was causing an acute inflammation An autoimmune response to a self antigen – the immune system attacks healthy tissue, mistaking it (them) for harmful pathogens. A chronic irritant of low intensity that persists Examples of diseases and conditions with chronic inflammation include: asthma, chronic peptic ulcer, tuberculosis, rheumatoid arthritis, chronic periodontitis, ulcerative colitis and Crohn’s disease, chronic sinusitis, and chronic active hepatitis.

Our infections, wounds and any damage to tissue would never health without inflammation – tissue would become more and more damaged and the body, or any organism, would eventually perish.

However, chronic inflammation can eventually cause several diseases and conditions, including some cancers, rheumatoid arthritis, atherosclerosis, periodontitis, and hay fever. Inflammation needs to be well regulated Enas753 (talk) 13:11, 1 May 2018 (UTC)