Search results
Results from the WOW.Com Content Network
In cell biology, the meristem is a type of tissue found in plants. It consists of undifferentiated cells (meristematic cells) capable of cell division. Cells in the meristem can develop into all the other tissues and organs that occur in plants. These cells continue to divide until they become differentiated and lose the ability to divide.
This tissue provides support to plants and also stores food. Chlorenchyma is a special type of parenchyma that contains chlorophyll and performs photosynthesis. In aquatic plants, aerenchyma tissues, or large air cavities, give support to float on water by making them buoyant. Parenchyma cells called idioblasts have metabolic waste.
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues, or organs under sterile conditions on a nutrient culture medium of known composition. It is widely used to produce clones of a plant in a method known as micropropagation .
It is given by injection into a vein. [2] Side effects may include irritation of the vein in which it is given, high blood sugar, and swelling. [2] [3] Excess use may result in low blood sodium and other electrolyte problems. [2] Intravenous sugar solutions are in the crystalloid family of medications. [4]
Parenchyma is the tissue made up of cells and intercellular spaces that fills the interior of the body of a flatworm, which is an acoelomate. This is a spongy tissue also known as a mesenchymal tissue , in which several types of cells are lodged in their extracellular matrices .
Any of a loosely defined class of organic compounds found in the tissues of many species of plants. Alkaloid molecules have one or more alkaline-reacting nitrogen atoms in their carbon structures. Many alkaloids are commercially important as drugs or poisons, e.g. caffeine , morphine , quinine , and strychnine , each of which occurs naturally ...
There are two forms of starch, transitionary starch and storage starch. Transitionary starch is synthesised via photosynthesis and found in photosythetic plant tissue cells, such as the leaves. Storage starch is reserved for longer periods of time and is found in non-photosynthetic tissue cells such as the roots or stem.
Resin ducts are common in gymnosperms and occur in various tissues of roots, stems, leaves, and reproductive structures. Gum ducts are similar to resin ducts and may contain resins, oils, and gums. Usually, the term gum duct is used with reference to the dicotyledons, although gum ducts also may occur in the gymnosperms .