The complex of symptoms brought about by excessive exposure to
radiation. ARS is the result of an acute dose; some early
visible symptoms may include nausea, vomiting, and fatigue,
followed by a predictable progression of other deterministic
effects depending on the total dose. Serious illness that occurs
when the body receives a high dose of penetrating radiation
(that is, able to reach internal organs) over a short period of
time (usually minutes). The earliest symptoms are nausea,
fatigue, vomiting, and diarrhea. Hair loss, bleeding, swelling
of the mouth and throat, and general loss of energy may follow.
If the exposure has been approximately 10 Gy or more, death may
occur within 2 - 4 weeks. Acute Radiation Syndrome Acute
Radiation Syndrome (ARS): An animated video of what happens to
the bone marrow and key blood elements when exposed to high
levels of radiation. HEALTHY BONE MARROW CELLS Bone marrow cells
are the source of white blood cells, or neutrophils, necesssary
for fighting infections, and platel