A neuron consists of a cell body (cyton or soma) with a nucleus and cytoplasm, from which long thin hair- like parts arise called dendrons. ii. Question 1. Muscle cells are elongated and large sized, so they are called muscle fibres. It helps in fighting foreign antigen and toxin. Cork cell prevent loss of water from plant body,infection and mechanical injury. In aquatic plants, large air cavities are present in parenchyma. The cells consist of cytoplasm and nucleus that is surrounded by a cell wall. Fibers consist of very long, narrow, thick and lignified cells. Parenchyma is found in all parts of plant such as cortex, pith, palisade, mesophyll, flower, seed etc; It is also found in vascular tissues. The cells of connective tissue are loosely spaced and embedded in an intercellular matrix. Cells of epidermis are elongated and flattened, without intercellular space. Ø Parenchyma is the least specialized along simple permanent tissues in plants. In collenchymas, intercellular spaces are generally absent. Dark and light bands (cross striations) present. It gives strength, rigidity, flexibility and elasticity to the plant body and, thus, enables it to withstand various strains. Thank you... Labels: aerenchyma, angular, chlorenchyma, Different types of parenchyma, loose parenchyma, prosenchyma, Structure and Function. The cells of sclerenchyma are closely packed without intercellular spaces. Page - 1 . What is the location of parenchyma, sclerenchyma, collenchyma in plant? It is the outermost protective layer of plant organs. Tissues Class 9 Extra Questions Very Short Answer Type. (a) Parenchyma (b) Sclerenchyma (c) Collenchyma (d) Epithelial tissue. On the basis of their location, structure and function, there are following three types of muscle fibers: Striated muscles (stripped, skeletal or voluntary muscles), Smooth muscles (unstriated, visceral or involuntary muscles). SCLERENCHYMA. Long bones contain bone marrow in hollow, narrow cavity. ... Parenchyma, collenchyma and sclerenchyma are the three types of simple tissues. All right reserved. Parenchyma cells are living cells with a prominent nucleus. Location: They are present in the heart. They protect plant from loss of water,mechanical injury and invasion by parasitic fungi. 4)Transport of material occur through cell wall. Class: IX. Husk of coconut is made of sclerenchymatous tissue. They are found mainly in the cortex of stems and in leaves. Ø The secondary cell wall is lignified and very hard. Parenchyma and Sclerenchyma Tissues Parenchyma Tissue. Class 9 Science Chapter 6 Extra Questions and Answers Tissues. Cork cells are dead,compactly arranged,no intercellular spaces,rectangular,vacuolated. SIZE:varies from few microns (1cm= 10mm; 1mm=1000µm) to few cms Smallest living cell is PPLO ( Pleuro Pneumonia Like Organism) - 0.1µm Largest living cell is Egg of an Ostrich , 170 to 180 mm in diameter. ... unstriated, and cardiac muscles on the basis of their structure and site/location in the body. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. Aerenchyma: A spongy or soft plant tissue with large air spaces found between the cells of the stems and leaves of many aquatic plants, which allows exchange of gases between the shoot and the root Chlorenchyma: In some cases the parenchyma cells contain chloroplasts and are called as chlorenchyma.These cells are meant for photosynthesis. Share with your friends. Xylem parenchyma 4. Its matrix consists of two kinds fibers: white collagen fibers and yellow elastic fibers. Except xylem parenchyma, all other elements are dead and bounded by thick lignified wall. The main function of parenchyma is to provide support and to store food. Name the following: (A) Tissue that forms inner lining of our mouth. Q8: Which of the followings lack vacuoles in their cytoplasm ? 1)It act as supporting and packing tissue between organs lying in body cavity. Practice more on Tissues. Difference between Parenchyma, Collenchyma and Sclerenchyma. The adipose tissue is abundant below the skin, between the internal organs (e.g., around the kidney) in yellow bone marrow. All these cells coordinate to perform a common function. They also have a chemical called suberin in their walls that makes them impervious to gases and water. Parenchyma, collenchyma, and sclerenchyma are the three types of simple permanent tissues. The key difference between chlorenchyma and aerenchyma is that chlorenchyma is a specialized parenchyma tissue that contains chloroplasts and carries out photosynthesis while aerenchyma is a spongy tissue that contains large air spaces.. Parenchyma tissue is one of the three types of ground tissues in plants. For example: cork cambium. It consists of large number of oval and rounded adipose cells (adipocytes) filled with fat globules. Please take 5 seconds to Share. Study Material and Notes of Ch 6 Plant Tissues Class 9th Science. It protects plants from external injury and infection. i. Prosenchyma: it is long and tapering parenchymatous cell present in some plants. These are intercellular medium, connective tissue cells and fibers. Nerve supply from both autonomous and central nervous system. The cells of this tissue are tightly packed and it forms continuous sheet. The nervous tissue is responsible for the reception and transmission of information between different parts of the body. tissue. Parenchyma mainly works are packing material in plant parts. Causes movement of small solid particles or mucus in a specific direction through the ducts. Parenchyma Definition. Class-9 » Science. Sieve tubes 2. 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