abnormal tissue

Parthenogenesis and Tissue Culture - Parthenogenesis is a form of reproduction in which the ovum develops into a new individual without fertilisation. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g., the aphi..

Histologic and Cytologic methods involve Biopsy and histological examination of the affected tissue. For e.g., Paps test is employed to detect cervix cancer. Blood tests for abnormal WBC count for Leukaemia, Bone marrow Biopsy are also used to detect Leukaemi..

Detection and Diagnosis of Cancer - 1) Histologic and Cytologic methods involve Biopsy and histological examination of the affected tissue. For e.g., Paps test is employed to detect cervix cancer. Blood tests for abnormal WBC count for Leukaemia, Bone marrow Biopsy are also used..

Cancer is characterised by uncontrolled growth and division of certain body tissues, so forming a tumour. It is one of the major killers today. Normally cell division is a regulated process. Mature cells are replaced by new cells produced by cell division and differentiation. Due to alt..

Growth and division of normal cells are regulated by control mechanisms. One such control mechanism is contact inhibition. As a result of multiplication, the cells become crowded and come in contact with one another. This surface contact checks movement and division of cells. Therefore, the genes w..

1) Non-invasive diagnostic techniques are those that can be applied without penetrating the skin. 2) X-rays have a remarkable ability to penetrate matter. They help to provide detailed images of dense parts of the body like bones. 3) The photographic image produced by x-radiation is called Radiogra..

Every multicelluar organism begins its life as a single cell called zygote which by cleavage forms numerous identical cells. As development proceeds, these cells become specialised into components of various tissues and organs. The process of specialisation called differentiation ..

Summary - Every multicelluar organism begins its life as a single cell called zygote which by cleavage forms numerous identical cells. As development proceeds, these cells become specialised into components of various tissues and organs. The process of specialisation called differentiatio..

Vasodilation increases blood supply to the damaged area which will help to remove toxic products and dead cells. Increased permeability of blood vessels permits white blood cells and serum proteins to enter into the injured area. These changes occur due to release of chemical alarm signals, mainly..