Which tissue type forms glands?

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QUESTION: Which tissue type forms glands?

ANS:

  • Epithelial tissue forms glands.
  • Epithelial tissue is one of the four main types of animal tissue.
  • It is specialized for covering body surfaces and lining body cavities.
  • Within epithelial tissue, there are specific cells that are modified to form glandular structures.
  • Glands are structures that produce and secrete substances, such as hormones, enzymes, mucus, sweat, and oil.
  • They can be classified into two main types based on their structure and mode of secretion:
  • Exocrine Glands secrete their products into ducts that lead to body surfaces or cavities.
  • Endocrine Glands secrete their products directly into the bloodstream, without the use of ducts.
  • They produce hormones that regulate various bodily functions.
Tissue Type                                 Description
Epithelial Tissue

 

 

 

 ·        Specialized tissue that covers body surfaces and lines body cavities.

·        Consists of closely packed cells with minimal extracellular matrix.

·        Functions in protection, secretion, absorption, and sensation.

·        Forms glandular structures for secretion of substances.

·        Can be classified into different types based on cell shape (e.g., squamous, cuboidal, columnar) and layer arrangement (e.g., simple, stratified). Examples of glands formed by epithelial tissue include

·        Sweat glands

·        Salivary glands

·        Sebaceous glands

·        Mammary glands
Glandular Structures ·        Formed by modifications of epithelial cells within the epithelial tissue.

·        Epithelial cells undergo structural changes to become secretory cells.

·        Glandular structures can be unicellular or multicellular.

·        Unicellular glands, such as goblet cells, are scattered within epithelial tissues and secrete mucus.

·        Multicellular glands consist of clusters of glandular cells organized into structures such as ducts and secretory units.

·        Glandular structures can be exocrine or endocrine glands.
Exocrine Glands

 

 ·        Secrete their products into ducts that lead to body surfaces or cavities.

·        Examples include sweat glands, salivary glands, sebaceous glands, and pancreas.

·        Glandular cells of exocrine glands produce substances that are transported through ducts and released onto body surfaces or into body cavities.

·        The ducts can be simple or branched, and the secretory units can be tubular, acinar (rounded), or a combination of both.
Endocrine Glands ·        Secrete their products directly into the bloodstream, without the use of ducts.

·        Examples include pituitary gland, thyroid gland, adrenal glands, and pancreas.

·        Glandular cells of endocrine glands produce hormones that are released into the surrounding interstitial fluid and then enter the bloodstream for distribution to target cells throughout the body

·        Endocrine glands are highly vascularized to facilitate hormone transport.

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