How well do you know about the lymphoid organs and defense systems of the body?

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Questions and Answers

Which of the following is NOT considered a lymphoid organ?

  • Liver (correct)
  • Thymus gland
  • Spleen
  • Tonsils

Which type of tissue is predominant in lymphoid organs?

  • Adipose tissue
  • Reticular connective tissue (correct)
  • Smooth muscle tissue
  • Epithelial tissue

Which lymphoid organ filters and cleanses blood, destroys worn-out red blood cells, and stores platelets?

  • Tonsils
  • Peyer's patches
  • Spleen (correct)
  • Thymus gland

What is the function of the thymus gland?

<p>To produce thymosin that develops active T-lymphocytes (B)</p> Signup and view all the answers

What is the function of MALT (mucosa-associated lymphoid tissue)?

<p>To contain B and T-lymphocytes and be involved in early detection of invaders (B)</p> Signup and view all the answers

What is the function of tonsils?

<p>To trap and remove pathogens (B)</p> Signup and view all the answers

Which defence system includes lymphocytes and antibodies?

<p>Specific defence system (C)</p> Signup and view all the answers

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Study Notes

  1. Lymphoid organs include the spleen, thymus gland, tonsils, Peyer's patches, and scattered lymphatic tissue.
  2. Lymphoid organs are characterized by predominance of reticular connective tissue and lymphocytes.
  3. Only lymph nodes filter lymph.
  4. The spleen is the largest lymphoid organ and filters and cleanses blood, destroys worn-out red blood cells, and stores platelets.
  5. The thymus gland produces thymosin that develops active T-lymphocytes.
  6. MALT (mucosa-associated lymphoid tissue) contains B and T-lymphocytes and is involved in early detection of invaders.
  7. Tonsils are small masses of lymphatic tissue that surround the pharynx and function to trap and remove pathogens.
  8. Peyer's patches are located in the wall of the small intestine and contain macrophages to capture and destroy bacteria.
  9. The body has two defence systems to fight foreign pathogens: nonspecific and specific.
  10. The nonspecific defence system includes the skin, mucous membranes, phagocytic white cells, anti-microbial proteins, and inflammatory response and fever, while the specific defence system includes lymphocytes and antibodies.

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