A complex tissue is made up of more than one type of cell-elements, which work together as a unit. There are two types of complex tissues: Xylem tissues Phloem tissues which constitute a vascular bundle, the conducting system of the plant. Fig. 8:...
Secretory tissues are composed of cells, which contain various kinds of secretions in them. Secretory tissues are of two types: Glandular tissue Laticiferous tissue Glandular Tissue This tissue is composed of some special structures called glands, which contain some secretory or excretory products,...
Anatomical features or internal structures of plant drugs are very useful in assigning the morphological groups of powdered, sectioned, broken or mutilated crude drugs. Not only that, they often offer important diagnostic characters for identification of both entire and...
Cell contents or cell inclusions refer to those substances, which are present in the cell but do not constitute any of its parts or take any part in its functions. They occur mainly in the cell vacuole although many...
Drugs are obtained from almost all forms of plants ranging from unicellular yeast to highly differentiated higher plants. Identification of these diversified drugs and their sources was formerly based on their morphological characters. These Characters are not always reliable,...
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