Cancer

Cancer is a group of disease in which cell grow divide out of control, resulting in change of DNA in cell cycle. This prevents cells from staying in interphase as it should be. One or more of checkpoints fails, so the cell and all of its subsequetn daughter cells continue to divide uncontrollably.

Some types of cancer run in families, whereas others are trigguered by environmental factors. Some cancers have may have both hereditary ad environmental causes.

Cancer is not infectious: You can't receive it from someone who has it.

Cancer is serious concerns for humans, as other organism like, dogs, fishes, cats and even plant can also develop cancer.

Cancer Cells

Cancer cell = one continuing dividing despite sending messages from nucleus or surrounding cells to stop dividing. Cell’s checkpoints army fails to idendity problems or kill cell.

This may create growing cells mass that form lump or tumour.

Uncontrolled growth and division may create a rapidly growing mass of cells forming a lump or tumour.

Tumour's cell may stay together and have no serious effect on surrounding.

This is called benign tumour and its cells aren’t cancerous.

Cancerous: spread into/invade, nearby tissues and can travel to distant places in body to form new tumors.

Tumour’s cell may stay together and cause no harm to surrouding tissues. This is called benign tumour. The cells in it aren’t cancerous. But, sometimes a benign tumour can grow so large that it physically crowd nearby cells and tissues, which can affect their normal functions. A mass of cell = malignant tumour if it interferes with function of neighbouting cells and tissues, such as production of enzymes or hormones.

Malignant tumours may even destroy surrounding tissues. The cell in a malignant are considered cancerous.

Sometime, cancer cells break away from original/primary tumour and move to different body part if they continue grow nonstop, they start a new/secondary tumour, a process known as metastasis, which is why cancer is so dangerous.

Cell Death (Cell Division gone wrong: Cancer)

Cancer is a group of disease in which cells grows and divide out of control, resulting in from change of DNA that controls cell cycle. This change prevent cells from staying in interphase for normal amount of time.

Differences between Cancer cells and normal cells

What's the difference of behaviour between cancer cells that from of normal cells?

Normal cells follow a typical cycle: They grow, divide and die. Cancer cells, on the other hand, don't follow this cycle. Instead of dying, they multiply and continue to reproduce other abnormal cells.

Can you cach cancer from someoone who has it?

There is nothing that will cause a cancer to be passed from one person to another, except for extremely rare circumstances.

Why might be easy to overlook cancer in its early stages?

Early warning signs of cancer are often similar to other common illnesses,

Apoptosis

It is the death of cells that's no longer useful or has lost its ability to function, which occurs as normal function of a organism's growth/development. The average human loses between 50 and 70 billion cells each day due to apoptosis. For average child of around 8-14 year old, around 20-30 billion cells per day.

Differences between normal WBC and apoptotic one.

WBC = White Blood Cell

Comic to understand Apoptosis

Cancer

What happens when damage to a cell impairs its ability to commit apoptosis and it divides and divides and divides? :

It's Cancer

Tumors

Aka lump, lesion, neoplasm

An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should.

The cells of the tumour may stay together and have no serious effect on surrounding tissues. This is called benign tumour and cells inside aren’t cancerous.

Benign tumor

"Benign" mean to condition, tumor or growth not cancerous, meaning it won't spread to other body part.

The word is also used to describe none dangerous/serious conditions.

Mass of cells that don't invade nearby tissue or metastasize (spread throughout body).

Compared to malignant/cancerous tumors, benign tumors may have slower growth.

Maligant tumor

mass of cell if it interferes with function of neighbouring cells and tissues, like production of enzymes or hormones. Malignant tumours may even destroy surrounding tissues.

Difference between Tumor and Cancer

Unlike cancers, tumors are abnormal growth or mass of tissue. Cancer is a group of diseases caused by the uncontrolled growth and spread of abnormal cells.

When a neoplasm/cancer is malignant, it's called cancer. This video explains what makes a neoplasm (or tumor) malignant; it is based on four factors: differentiation, rate of growth, local invasion and metastasis.