Definition: Preparations made from animal tissues or organs (ANIMAL STRUCTURES). They usually contain many components, any one of which may be pharmacologically or physiologically active. Tissue extracts may contain specific, but uncharacterized factors or proteins with specific actions.
not for chemical substances "extracted" from tissues (= specific chemical + organ or tissue /chem)
Rumalon [ Arumalon,Rumalone ] for drug therapy of osteoarthritis; tissue extract of cartilage & bone containing no protein, only small molecules such as amino acids, nucleotides, small polypeptides, oligosaccharides and minerals;