Question

how many types of parenchyma name them.

Answer 1

n the different regions of the plant body parenchyma cells are involved in different functions. On this basis, following types of parenchyma can be recognised.

Chlorenchyma is the parenchyma in which the cells contain large number of chloroplasts. Chlorenchyma takes part in photosynthesis. It occurs in the leaves and other green parts of the plant body.
Prosenchyma is a type of parenchyma where cells are elongated with tapering ends.
Arenchyma is the parenchyma in which the cells enclose large intercellular spaces that are filled with air. Aerenchyma helps in buoyancy and respiration. It is characteristically found in aquatic floating plants.
Vascular parenchyma is the parenchyma, which is found associated with the vascular tissues xylem and phloem. Accordingly, it is distinguished into xylem parenchyma and phloem parenchyma.
Medullary parenchyma is the parenchyma, which is found radially arranged in between the vascular bundles in the stem. It is meant for storage of reserve food.
Conjunctive parenchyma is the parenchyma, which occurs in the root system. It is specially meant for storage of water.
Armed parenchyma is the parenchyma, which is found in the epidermis of leaves in some gymnosperms. The cells have many spiny projections. It is defensive in function.
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The term describes cells in both plant and animal tissues. In plants, parenchyma cells are a distinct type of tissue that can grow and divide and they have a thin cell wall. They make up flowers, leaves, and the inner parts of roots and stems that grow and divide. These cells secrete sap, exchange gases, and conduct photo synthesis. Plant parenchyma is classified into 4 shapes: polyhedral, stellate, elongated, and lobed.

In animals, parenchymal cells are the functional cells within the organism. This does not include those that have structural and/or protective functions like bone cells that make up a skeleton. In the brain, the parenchyma consists of neurons and glial cells. In addition, the cancer cells in tumors that are not involved with blood vessels are called parenchyma.

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Answer 2

Plants. In plants, "parenchyma" is one of the three main types of ground tissue, and the most common. It can be distinguished through their thin cell wall as compared to other cells.