Chemical, spectroscopic, or microscopic detection of extremely small amounts of blood.
Fecal Occult Blood Test,Blood, Occult
D006801
Humans
Members of the species Homo sapiens.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000611
Aminobiphenyl Compounds
Biphenyl compounds substituted in any position by one or more amino groups. Permitted are any substituents except fused rings.
Biphenylamines,Compounds, Aminobiphenyl
D001560
Benzidines
Very toxic industrial chemicals. They are absorbed through the skin, causing lethal blood, bladder, liver, and kidney damage and are potent, broad-spectrum carcinogens in most species.