what is the utility of tissues in multi-cellular organisms?
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A group of cells in multicellular organisms form a tissue. A group of cells which have similarities in their structure form a tissue. These cells as a tissue perform their functions collectively and efficiently. Cells in a tissue should have a same origin to perform a specific function.
Tissues can be plant tissues or animal tissues.
Plant tissues help the plant in growth, transport, cell division, perform all other life processes.
Plant tissues can also be categorized into meristematic tissues and permanent tissues.
*Meristematic tissues: They have the ability to grow by rapid division. They help in the primary growth of the plant. Increase in length and increase in diameter of the plant are brought about by these meristematic cells. Meristematic cells can be apical, intercalary or lateral.
*Permanent tissues: These tissues can be further classified into simple permanent, complex permanent and special tissues.
*Simple permanent can be categorized into parenchyma, collenchyma and sclerenchyma based on their function.
*Complex permanent tissue comprises of xylem and phloem. Xylem is useful in transport of water and soluble substances. Xylem is made up of tracheids, vessels, fibres and xylem parenchyma. Phloem is useful in transport of food molecules. Phloem comprises of sieve tubes, sieve cells, companion cells, phloem fibres and phloem parenchyma.
Animal tissues are the ones present only in animals. They help the animal to perform all the life processes. They comprise of epithelial tissue, connective tissue, muscle tissue and nervous tissue.
*Epithelial tissue forms a lining all over the body of the organism. It protects the inner lying parts. It is also secretory in function to secrete sebum and excrete wastes along with sweat. Sometimes it is absorptive in nature.
*Connective tissues are fibrous in nature. They include blood and bone. These help in binding other tissues together. They also provide support to other tissues.
*Muscle tissues are made up of muscle cells .These are elastic in nature they have tensile strength. They bring about movement in the organism. These muscles can be voluntary or involuntary in function. Muscle tissue is categorized into visceral muscles, skeletal muscles and cardiac muscles.
*Nervous tissue is the tissue which works in coordinating the organs of the body by generating impulses. It is made up of special cells called as neurons. In the central nervous system, the nervous tissue makes up brain and spinal cord. In the peripheral nervous, system it makes up cranial and spinal nerves.
Tissues can be plant tissues or animal tissues.
Plant tissues help the plant in growth, transport, cell division, perform all other life processes.
Plant tissues can also be categorized into meristematic tissues and permanent tissues.
*Meristematic tissues: They have the ability to grow by rapid division. They help in the primary growth of the plant. Increase in length and increase in diameter of the plant are brought about by these meristematic cells. Meristematic cells can be apical, intercalary or lateral.
*Permanent tissues: These tissues can be further classified into simple permanent, complex permanent and special tissues.
*Simple permanent can be categorized into parenchyma, collenchyma and sclerenchyma based on their function.
*Complex permanent tissue comprises of xylem and phloem. Xylem is useful in transport of water and soluble substances. Xylem is made up of tracheids, vessels, fibres and xylem parenchyma. Phloem is useful in transport of food molecules. Phloem comprises of sieve tubes, sieve cells, companion cells, phloem fibres and phloem parenchyma.
Animal tissues are the ones present only in animals. They help the animal to perform all the life processes. They comprise of epithelial tissue, connective tissue, muscle tissue and nervous tissue.
*Epithelial tissue forms a lining all over the body of the organism. It protects the inner lying parts. It is also secretory in function to secrete sebum and excrete wastes along with sweat. Sometimes it is absorptive in nature.
*Connective tissues are fibrous in nature. They include blood and bone. These help in binding other tissues together. They also provide support to other tissues.
*Muscle tissues are made up of muscle cells .These are elastic in nature they have tensile strength. They bring about movement in the organism. These muscles can be voluntary or involuntary in function. Muscle tissue is categorized into visceral muscles, skeletal muscles and cardiac muscles.
*Nervous tissue is the tissue which works in coordinating the organs of the body by generating impulses. It is made up of special cells called as neurons. In the central nervous system, the nervous tissue makes up brain and spinal cord. In the peripheral nervous, system it makes up cranial and spinal nerves.
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since tissue when grouped together forms organs then organs then group together forms organs system and then forms human body thus to tissues are necessary to do all the life sustaining functions .
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