CELL 3 The smallest unit of body is called a cell. The effects of radiation on the human body Radioactive materials are hazardous. Its effects are more pronounced in cells that reproduce rapidly, such as the stomach lining, hair follicles, bone marrow, and embryos. It is well known that weak EMF could cause all sorts of dramatic non-thermal effects in body cells, tissues and organs. Radiation can harm either the whole body (somatic damage) or eggs and sperm (genetic damage). The interaction of ionizing radiation with the human body, arising either from external sources outside the body or from internal contamination of the body by radioactive substances, leads to biological effects which may later show up as clinical symptoms. Biological effects of radiation are typically can be divided into two categories. Radiation exposures during space travel may kill cells, weaken the immune system, cause mutations and have other effects that can lead to cancer, cataracts, cardiovascular and central nervous system injuries and other disorders. Biological Effects of Exposure to Radiation. Generally, lasers in the UV region induce photochemical reactions; lasers in the infrared region induce thermal effects. The effects of radiation exposure can be acute or be manifested as a late effect whose damaging results are not seen upwards to 20-30 years following exposure. 2 4. Nuclear radiation can ionise chemicals within a body, which changes the way the cells behave. The biological effects of non-ionizing laser radiation include the action of visible, ultraviolet (UV), or infrared radiation upon tissues. has sufficient energy to affect the atoms in living cells and thereby damage their genetic material (DNA). BIOLOGICAL EFFECTS OF RADIATION Definition :- The harmful effects caused to human being and other living beings due to their exposure to radiation is called as biological effects of radiation. The first category consist of exposure to high doses of radiation over shots period of time producing acute or short term effects. The potential for ultrasound to produce biologic effects was first reported in 1917. Slide set: Radiation Effects. Abstract. Cells of different organs have different shapes sizes & functions. Biological effect of radiation: In biological effect of radiation, there are many dangerous effects of our health and body. The current established standards of exposure to EMFs in Poland and in the rest of the world are based on the thermal effect. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes. Ionizing radiation Ionizing radiationRadiation with so much energy it can knock electrons out of atoms. The most influential process of EMF impact on living organisms, is its direct tissue penetration. Ionizing radiation can potentially affect the normal operations of these cells. Radiation dose to the human body can be divided into whole body radiation exposure and localized radiation exposure; and the effects thereupon to somatic tissues and to germ tissues. The human body is made of many organs, and each organ of the body is made up of specialized cells. What are the radiation risks for space travel?