Cancer, Biology

Assignment Help:

What is Cancer?

Besides AIDS, Cancer is another deadly human disease of our times about which people are panicky all over the world. It is estimated that one in every three persons is a potential victim of cancer. Cancer is a disease resulting from an abnormal behaviour of cells in respected to their growth  and division during embryonic development, body growth, or regeneration and repair. Cellular growth and division occur under strict control of cellular genes. A cell which loses this control goes awry; It starts growing and dividing in an uncontrolled manner, forming an abnormal mass of similar cells in the concerned tissue.  This cell is a cancerous cell, and the mass of cells it gives rise to is called a tumour. This continues expanding and damaging neighbouring cells but, sooner or later. it generally becomes encapsulated in a fibrous capsule formed by the connective tissue around. Such     a localised tumour, called a benign tumor can be surgically removed .Thus unless a benign tumor becomes very large, it does not cause any significant discomfort to the patient.

If some cells  in an early tumor before encapsulation acquire further structural or functional abnormalities, these cells become invasive i e these break away  from the tumor, wander into the circulatory system and spread to distant sited in the body where these establish secondary tumours called metastases. The parent tumor is now called malignant. Such a tumor and its wandering cells are referred to as metastatic. The secondary tumors causes extensive damage to the tissues in   which these are formed, and this results into a full blown cancer causing death. A malignant tumor of connective tissue is called sarcoma.


Related Discussions:- Cancer

Enzymology, Ethylene glycol is a poison that causes about fifty deaths a ye...

Ethylene glycol is a poison that causes about fifty deaths a year in the United States. Treating people who have drunk ethylene glycol with massive doses of ethanol can save their

What do you mean by hansens disease, Q. What is Hansen's disease (etiologic...

Q. What is Hansen's disease (etiological agent, mode of transmission, clinical manifestations and prevention)? The etiological agent of the Hansen's disease is bacteria called

Explain water and electrolyte imbalance during kwashiorkor, Explain Water a...

Explain Water and electrolyte imbalance during kwashiorkor? The total body water and especially the extracellular fluid volume are increased in all forms of PEM. At the same ti

Define dietary habits factor for obesity, Define Dietary habits factor for ...

Define Dietary habits factor for obesity? You are aware that a positive energy balance is one of the major contributory factors for obesity. Some people are in the habit of eat

State the terms - blastocoel and blastopore, State the terms - Blastocoel a...

State the terms - Blastocoel and Blastopore? During the development of embryo, single cells divide and form a hollow ball of cells one cell layer thick. Cavity inside this holl

What are other important human diseases caused by protozoans, What are othe...

What are other important human diseases caused by protozoans? Some other significant protozoan infections are amebiasis, trichomoniasis, giardiasis, leishmaniasis, toxoplasmosi

How are living beings divided into two groups, According to cellular organi...

According to cellular organization how are living beings divided into two groups? Cellular beings are separated into two groups: the prokaryotes, unicellular beings whose sole

Drowning - paediatric emergencies, Drowning: Drowning is a cause of a...

Drowning: Drowning is a cause of accidental death  in children Accidental drowning may occur because children  do not  have adequate protective supervision.  It may be defined

What is the function of the collagen fibers, What is the function of the co...

What is the function of the collagen fibers of the connective tissue? There are dissimilar collagen types. The major function of these proteins is to keep the shape and the str

Uses of microbes in industry-amino acids and vitamins, Normal 0 ...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd