These are aluminum atoms. An atom is the smallest particle of an element that has the properties of that element. Some properties of aluminum are: shiny, silver colored, fragile, and thin. Each element has its own type of properties. Chemists use symbols to represent elements. A symbol is a letter or picture used to represent something. Chemists use one or two lettters to represent elements. The symbol for aluminum is Al. The symbol for oxygen is O. A model of an oxygen molecule. The symbol for oxygen is O. O stands for one atom of oxygen.
OCCULT BLOOD Occult blood is blood that cannot be seen without a microscope. Normal urine does not contain any red blood cells, except femalesâ urine during menstruation. Occult blood in someoneâs urine can indicate kidney, bladder, prostate, or vaginal infections.UROBILINOGEN Urobilinogen is a breakdown product of the hemoglobin in red blood cells. It is not found in normal urine! Urobilinogen in a urine specimen may indicate the rapid destruction of red blood cells.ormal urine does not contain any red blood cells, except femalesâ urine during menstruation. Occult blood in someoneâs urine can indicate kidney, bladder, prostate, or vaginal infections.
A fecal occult blood test is done primarily to detect colon cancer in people without intestinal symptoms. Cancers of the colon are common and frequently produce fecal occult blood long before they cause other symptoms such as abdominal pain, rectal bleeding, or changes in bowel habits.ecal occult blood usually is a result of slow (often intermittent) bleeding from inside the upper or lower gastrointestinal tract. The slow bleed does not change the color of the stool or result in visible bright red blood.