What is cancer 12th biology?

What is cancer 12th biology?

A cancer is an uncontrolled proliferation of cells. In some the rate is fast; in others, slow; but in all cancers the cells never stop dividing. This distinguishes cancers — malignant tumors — from benign growths like moles where their cells eventually stop dividing (usually).

What are the causes of cancer class 12 biology?

Causes of Cancer

• Physical factors – Ionizing radiation, such as X-rays and gamma rays.
• Chemical factors – Such as tobacco and smoke.
• Biological factors – Viral oncogenes, proto-oncogenes and cellular oncogenes.

What is cancer write any 3 types of cancer with Example Class 12?

Listed here are a few types of cancer:

• Carcinoma. It is the most common form of cancer that affects the epithelial cells which form the lining of internal organs or the skin.
• Sarcoma.
• Leukaemia.
• Lymphoma.
• Melanoma.
• Myeloma.
• CNS Cancers.

What is cancer What are the four main types of cancer Class 12?

Four main types of cancer are:

• Carcinomas. A carcinoma begins in the skin or the tissue that covers the surface of internal organs and glands.
• Sarcomas. A sarcoma begins in the tissues that support and connect the body.
• Leukemias. Leukemia is a cancer of the blood.
• Lymphomas.

What is cancer explain five steps of cancer?

Stage I: Cancer is localized to a small area and hasn’t spread to lymph nodes or other tissues. Stage II: Cancer has grown, but it hasn’t spread. Stage III: Cancer has grown larger and has possibly spread to lymph nodes or other tissues. Stage IV: Cancer has spread to other organs or areas of your body.

What is cancer explain?

The Definition of Cancer Cancer is a disease in which some of the body’s cells grow uncontrollably and spread to other parts of the body. Cancer can start almost anywhere in the human body, which is made up of trillions of cells.

How is cancer formed?

Cancer develops when the body’s normal control mechanism stops working. Old cells do not die and instead grow out of control, forming new, abnormal cells. These extra cells may form a mass of tissue, called a tumor.

Who first discovered cancer?

The origin of the word cancer is credited to the Greek physician Hippocrates (460-370 BC), who is considered the “Father of Medicine.” Hippocrates used the terms carcinos and carcinoma to describe non-ulcer forming and ulcer-forming tumors.

What is cancer called?

Cancerous tumors may also be called malignant tumors. Many cancers form solid tumors, but cancers of the blood, such as leukemias, generally do not. Benign tumors do not spread into, or invade, nearby tissues. When removed, benign tumors usually don’t grow back, whereas cancerous tumors sometimes do.

Who is the father of cancer?

Who discovered cancer?

The first cause of cancer was identified by British surgeon Percivall Pott, who discovered in 1775 that cancer of the scrotum was a common disease among chimney sweeps. The work of other individual physicians led to various insights, but when physicians started working together they could draw firmer conclusions.