Special Tissues


 
 
Concept Explanation
 

Special Tissues

Tissues that have completely lost the ability to divide are called as permanent tissues. Permanent tissues are of three types : Complex, Simple and Special permanent tissues.

Special Tissues:

Besides simple and complex tissues, plants also have special tissues whose function is secretion. These tissues secrete latex, gums, resins, oils, etc. Latex is a thick, sticky white fluid secreted by rubber, banyan, fig trees and garden plants like oleander (kaner in Hindi). Based on modifications these tissues can be divided into Two types :

  •  Laticiferous Tissue : This plant tissue have latex. They originated from meristematic tissue and mature with other tissues. The cells are elongated, thin walled and multinucleated.
  • Glandular TissueThey possess various glands, that secretes oils, resins, tannin, mucilage etc.
  • Citrus and rose plants secrete oils, while gums and resins are secreted by many coniferous trees.
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    Sample Questions
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    Question : 1

    Which of the following are correct :

    (a) Latex is a thick, sticky white fluid secreted by rubber.

    (b) Tissues that have completely lost the ability to divide are called as permanent tissues.

    (c) Permanent tissues are of three types which are Complex, Simple and Special permanent tissues.

    Right Option : D
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    Explanation
    Question : 2

    Which of the following tissue is specialized for secretory function ?

    Right Option : C
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    Explanation
    Question : 3

    What are the characteristics of Laticiferous Tissue ?

    Right Option : D
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    Explanation
     
     
     
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