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Loading and Unloading of Sieve Tubes
In order to understand the loading of food from manufacturing leaf cells to sieve tubes we must examine the anatomy of a minor vein shown in Figure. We can see
Figure: A cross-section of a minor leaf vein. (MC-Mesophyll Cell, XE -Xylem Elements, SE-Sieve Element, TC-Transfer Cells, PP-Phloem Parenchyma cell.
a xylem vessel (X), two sieve elements (SE) which are relatively smaller than other cells and without cytoplasm, the modified companion cells or transfer cells (TC) with dense cytoplasm and phloem parenchyma (PP) which is less dense and vacuolated.
what are the chemical changes takes place during cleavage
What is Single Ventricle Physiology ? In complete correction of a congenital cardiac condition, it is ideal to have two ventricle correction (Pulmonary and systemic ventricles
Skin puncture: skin puncture is usually done when small volume of blood is needed (e.g., blood glucose test) to avoid unnecessary venipuncture. However, skin puncture in
The symptoms and signs of endocarditis are often constitutional and, when localized, often result from a complication of IE rather than reflect the intracardiac infection itself. C
importance of biodevercity
Genioglossus Originates from superior genial tubercles which are located near the crest of the alveolar ridge in atrophic mandible. Therefore, one should be aware of it during
How many kidney in man?
Q. What is the relation between the hypophysis and the hypothalamus? The hypothalamus is a part of the brain situated just above the hypophysis and the hypothalamus gets centra
TYPES OF EGGS Different species of animal has different type of eggs. They are classified on the following basis - 1 . ON THE BASIS OF AMOUNT OF YOLK On the ba
For convenience, living things are placed into different groups. Taxonomic breakdown of living things comprises the following categories: Family, Class, Genus, Phylum, Order, K
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