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

Why is the sun the motor of the water cycle, Q. Why is the sun the "motor" ...

Q. Why is the sun the "motor" of the water cycle? The sun can be considered the motor of the water cycle for the reason that upon its energy the transformation of liquid water

Explain the characteristics of agar- agar, Explain the Characteristics of A...

Explain the Characteristics of Agar- Agar? There are many characteristics, which make agar-agar, an ideal solidifying agent. These are: (a) It has high gel strength, so it c

The neural impulse is transmitted along the axon, What is the mechanism by ...

What is the mechanism by which the neural impulse is transmitted along the axon? The neural impulse is transmitted with the neuronal membrane through depolarization of consecu

Ecological pyramids, one disadvantage of the pyramid if a tree and grass ea...

one disadvantage of the pyramid if a tree and grass each count as one organism

Biological diversity protection, Q. How can a great biological diversity pr...

Q. How can a great biological diversity protect an ecosystem from environmental damage? Why are less biodiverse ecosystems at risk of suffering deep biological harm if submitted to

Define the basic function of keratin in the epidermis, Q. What is the funct...

Q. What is the function of keratin in the epidermis? The epidermis is the outer layer of the skin made of epithelial tissue in the epidermis there are keratin-secreting cells (

Illustrate meiosis ii and meiosis i, Q. How many cells are made after meios...

Q. How many cells are made after meiosis II and meiosis I? After meiosis II four cells are created, After Meiosis I two cells with already separated homologous are created

Explain factors influencing rs content of foods, Explain factors influencin...

Explain factors influencing rs content of foods? 1) Presence of sugar and lipids: Studies so far show that presence or addition of lipids and sugar reduces RS content. 2) Ca

What is intercellular communication explain briefly, What is Intercellular ...

What is Intercellular Communication explain briefly? Both plant and animal cells have developed means of communication between cells. In animals, specialized areas of the cell

Explain the prokaryotic cells in details, Explain the Prokaryotic Cells in ...

Explain the Prokaryotic Cells in details? Prokaryotic Cells: Cells that lack a membrane-bound nucleus and have very few distinguishable internal structures when observed wit

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