Radiation in high doses can be dangerous no matter what, but some parts of the body are more sensitive than others. The most sensitive parts of the human body are the lymphoid organs, bone marrow, blood, testes, ovaries and intestines , according to the Collaboration for Nondestructive Testing[1].
Which tissue is most radiosensitive?
Rapidly proliferating non-differentiated cells are the most radiosensitive. Well known representatives of this class of cells are the stem cells of the hematopoietic tissues and the cells of the intestinal crypts. The differentiated fixed postmitotic cells are the most radioresistant.
Which organ is most radiosensitive?
The gastrointestinal (GI) tract is among the most radiosensitive organ systems in the body. In addition to the intestinal epithelium crypt, radiation exposure damages supporting structures such as endocrine glands of the GI tract [2].
What organs and body areas are more radiosensitive?
The blood-forming cells of the bone marrow are among the most radiosensitive cells in the body.
Why are some organs more radiosensitive?
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. ...
What organs are affected by radiation?
- Brain. Nerve cells (neurons) and brain blood vessels can die, leading to seizures.
- Eyes. Radiation exposure increases the risk of cataracts.
- Thyroid. ...
- Lungs. ...
- Heart. ...
- GI tract. ...
- Reproductive organs. ...
- Skin.
What are 5 effects of radiation?
| Dose (rem) Effects | 5-20 Possible late effects; possible chromosomal damage. | 20-100 Temporary reduction in white blood cells. | 100-200 Mild radiation sickness within a few hours: vomiting, diarrhea, fatigue; reduction in resistance to infection. |
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What cell in blood is most 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. Very sensitive cells are also oocytes and lymphocytes, although they are resting cells and do not meet the criteria described above.
What is the strongest ionizing radiation?
Alpha particles have approximately four times the mass of a proton or neutron and approximately ~8,000 times the mass of a beta particle (Figure 5.4. 1). Because of the large mass of the alpha particle, it has the highest ionizing power and the greatest ability to damage tissue.
What is the most radiosensitive part of any human cell?
| Question Answer | What are considered to be the most radioresistant phases of the cell cycle? Mid-to Late S-phase | What is considered to be the most radiosensitive part of a cell? Nucleus | Cell death which occurs before mitosis is termed: Interphase Death |
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Who is more radiosensitive male or female?
These data suggest that long-term radiosensitivity in females is higher than that in males who receive a comparable dose of radiation.
What is the most radiosensitive part of the eye?
LENS . The lens is the most radiosensitive structure of the eye and cataract is a well recognized long-term consequence of radiotherapy.
Why is bone marrow sensitive to radiation?
The cells in your bone marrow are sensitive to radiation therapy . The number of WBCs, RBCs, and platelets in your body may decrease, depending on the part of your body being treated and the dosage of radiation.
What is the most vulnerable organ in the body?
Your lungs are your most vulnerable organ.
Which is the most sensitive organ in our body?
Human skin is the most sensitive organ of the human body.
It has been reported that One square centimeter of skin has pain receptor 150, at least 25 which can sense light touch and 2 number of heat receptors.
Is the brain sensitive to radiation?
Recent studies have proven that the brain is, indeed, sensitive to irradiation . Cranial radiation therapy impacts a wide array of brain functions, causing cognitive decline, memory deficits, fatigue, and brain tumors in exposed individuals.
