What are the most radiosensitive tissues and organs?
What are the most radiosensitive tissues and organs?
The blood-forming cells of the bone marrow are among the most radiosensitive cells in the body.
What tissues are radiosensitive?
Amongst the body cells, the most sensitive are spermatogonia and erythroblasts, epidermal stem cells, gastrointestinal stem cells. The least sensitive are nerve cells and muscle fibers.
What are radiosensitive organs?
Hematopoietic system: Bone marrow and lymphatic tissues. (spleen, thymus gland, lymph node) Reproductive system: Testis and ovary. Gastrointestinal system: Mucous membrane and small‐intestinal.
Why are some tissues more sensitive to radiation?
Actively dividing cells that are less differentiated tend to show higher radiosensitivity. As a result, the supply of blood cells is suspended and the number of various types of cells in blood decreases. …
Are kidneys radiosensitive?
The importance of the kidney as a dose-limiting organ is likely to increase as smaller molecular vectors and radiometals become more commonly used in targeted radionuclide therapy. Data derived from kidney irradiation by external-beam therapy (XRT) indicate that the kidney is radiosensitive.
Is the liver radiosensitive?
Until recently, the liver was classified as a radioresistant organ, although it is in fact highly radiosensitive.
What are the organs affected by radiation?
As a result of these epidemiological studies, it was found that the mammary gland, skin, and colon, etc. are tissues and organs that are easily affected by radiation and develop cancer.
Which tissue or organ is the most sensitive to radiation quizlet?
stem cells are more sensitive to radiation than mature cells.
What is radiation nephropathy?
Radiation nephropathy is renal injury and loss of function caused by ionizing radiation; this will occur after sufficient irradiation of both kidneys (4).
Which body parts are most sensitive to touch?
The tongue, lips, and fingertips are the most touch- sensitive parts of the body, the trunk the least. Each fingertip has more than 3,000 touch receptors, many of which respond primarily to pressure.
What is radiosensitivity and why is it important?
Radiosensitivity is the relative susceptibility of cells, tissues, organs to the harmful action of radiation. It denotes the level of harm which radiation can cause to certain types of cells in the body.
Which of the following are characteristics of radiosensitive cells?
The characteristics of radiosensitive cells are: 1. High reproductive rate (many mitoses) 2. Undifferentiated (immature) 3. High metabolic rate Lymphocytes, germ cells, basal cells of skin and mucosa, and erythroblasts are examples of radiosensitive cells.
What organs are affected by radiation therapy?
These organs, cells or structures are Highly susceptible to the harmful effects of radiation. And we should be aware of the harmful effects radiation can have on these before proceeding with the treatment. Lymphoid organs. Bone marrow. WBC. Testes. Ovaries. Intestines.
Why are dividing cells more sensitive to radiation?
In general, dividing cells are more radiosensitive than nondividing cells (see above Effects on the cell ), with the result that radiation injury tends to appear soonest in those organs and tissues in which cells proliferate rapidly.
