Chapter Review:
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A group of cells having similar functions and similar structure is known as tissue.
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The growth of plants occurs only in certain specific regions. This is because the dividing tissue, also known as meristematic tissue.
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The xylem carries water and minerals obtained from the soil to the plant.
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Phloem transports products of photosynthesis from the leaves where they are synthesized to other parts of the plant.
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There are many small holes in the leaves of plants. These are called stomata.
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Parenchyma, collenchyma and sclerenchyma are three types of simple tissues.
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Xylem consist of :- (i) Tracheids (ii) Vessels (iii) Xylem parenchyma (iv) Xylem fibres.
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Phloem made up of:- (i) Sieve tubes (ii) Companion cells (iii) Phloem fibre (iv) Phloem parenchyma.
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The covering or protective tissues in the animal body are epithelial tissues.
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Cilia are hair-like projections on the outer surfaces of epithelial cells.
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Plasma is called a fluid matrix of blood.
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Blood and bones are connective tissues.
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Muscular tissue is responsible for movement of our body.
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Muscles present in our limbs move when we want them to, and stop when we so decide. Such muscles are called voluntary muscles.
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The movement of food in the alimentary canal or the contraction and relaxation of blood vessels are involuntary movements. Such muscles are known as involuntary muscles.
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The muscles of the heart show rhythmic contraction and relaxation throughout life. These involuntary muscles are called cardiac muscles.
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Nervous tissue is made of neurons that receive and conduct impulses.
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Two bones can be connected to each other by another type of connective tissue called the ligamen.
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Striated, unstriated and cardiac are three types of muscle tissues.