tissues
description
Transcript of tissues
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SCIENCE PROJECT
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TISSUES
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What are tissues ?
The group of cells that are similar in structure and work together to achieve a particular function are called tissues.
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Tissues
Plant tissues
Meristematic tissue
Permanent tissue
Animal tissues
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PLANT TISSUES
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MERISTEMATIC TISSUE
APICAL MERISTEM
INTERCALARYMERISTEM
LATERAL MERISTEM
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APICAL MERISTEM : • It is present at the growing tips of stems and roots.
• It increases the length of stems and the roots.
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Intercalary meristem:
• It is present at the bottom of leaves or internodes on twigs.
• It is helpful in the growth of stems and leaves.
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lateral meristem :
• It is also known as cambium.
• It increases the girth of stems and roots.
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PERMANENT TISSUES
SIMPLE PERMANENT TISSUE
COMPLEX PERMANENT TISSUE
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SIMPLE PERMANENT TISSUE
PARENCHYMA
COLLENCHYMA SCLERANCHYMA
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PARENCHYMA:• Parenchyma, in plants, tissue typically composed of living cells that are thin-walled, unspecialized in structure, and therefore adaptable, with differentiation, to various functions.• It forms the 1. innermost layers 2.inner layers 3.outer layersof the plants.
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Collenchyma :
• Collenchyma cells have thin primary walls with some areas of secondary thickening.
• Collenchyma provides extra structural support, particularly in regions of new growth.
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SCLERENCHYMA :
• Sclerenchyma cells have thick lignified secondary walls and often die when mature. • Sclerenchyma provides the main structural support to a plant.
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COMPLEX PERMANENT
TISSUEXYLEM PHLOEM
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• Xylem carry water and minerals from the roots to the leaves.
• Phloem tubes carry sugar & other organic nutrients made by plant from the leaves to the rest of the plant.
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ANIMAL TISSUES
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Animal tissueconnectiv
e
epithelial nerve
muscle
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Epithelial tissue:
• Epithelial tissue covers external surfaces and internal cavities and organs.
• Its functions are • protection• absorption• secretion
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Connective tissue:
• The cells of connective tissue are separated by non-living material.
•Connective tissue binds and supports body parts, protects, fills spaces, stores fat (for energy), and transports materials.
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Muscle tissue:
• Muscle tissue contracts in response to stimulation.
• It cannot lengthen by itself but is lengthened by the contraction of other muscles..Muscle tissue is used for locomotion, food movement in gut, and heat production.
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Nerve tissue:
• Nervous tissue responds to stimuli and transmits impulses from one body part to another.
• The outer layer-epidermis• The inner layer-Dermis• The deepest layer-Subcutaneous layer
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THANK YOU
DONE BY
R.ANGALA PARAMESHWARI