Human Lymphatic System
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Questions and Answers

The ______ is the largest lymphoid organ in the body.

spleen

The ______ is the only one interposed in blood circulation.

spleen

The ______ is covered by a capsule which extends to form trabeculae.

spleen

The ______ contains trabecular arteries and veins.

<p>trabeculae</p> Signup and view all the answers

The ______ is an organ that is interposed in blood circulation.

<p>spleen</p> Signup and view all the answers

The ______ is the largest organ in the lymphoid system.

<p>spleen</p> Signup and view all the answers

Trabeculae are formed from the extension of the ______ of the spleen.

<p>capsule</p> Signup and view all the answers

Trabecular arteries and veins are located in the ______ of the spleen.

<p>trabeculae</p> Signup and view all the answers

The ______ is a structure that extends from the capsule to form trabeculae.

<p>capsule</p> Signup and view all the answers

The ______ is a lymphoid organ that plays a vital role in blood circulation.

<p>spleen</p> Signup and view all the answers

Study Notes

Lymphatic System

  • The lymphatic system is a drainage system that assists the venous system by removing larger particles that escape into tissue fluid.
  • It reabsorbs excess interstitial fluid and transports dietary lipids.

Components of the Lymphatic System

  • Lymph: a clear fluid that flows through the lymphatic vessels
  • Lymphatic Vessels:
  • Lymphatic capillaries
  • Lymphatic vessels
  • Lymphatic trunk
  • Lymphatic ducts
  • Lymphatic Organs:
  • Thymus
  • Lymph nodes
  • Spleen
  • Tonsils
  • Lymphatic Cells

Lymph Nodes

  • Covered by a dense, irregular connective tissue capsule that extends to form trabeculae
  • Divided into outer cortex and inner medulla
  • Contain lymphoid nodules

Lymphatic Nodules

  • Found in lymph nodes and the lamina propria of the intestine

Tonsils

  • Palatine tonsils and pharyngeal tonsil
  • Covered by stratified, ciliated, columnar epithelium with no crypts

Thymus

  • Located in the mediastinum
  • Has a connective tissue capsule that penetrates the parenchyma and divides it into incomplete lobules
  • Each lobule has:
  • Peripheral dark zone called the cortex
  • Central light zone called the medulla, containing thymic corpuscles or Hassall corpuscles
  • Thymic corpuscles or Hassall corpuscles:
  • Characteristic of the thymus, but their function is unknown
  • Contain flat epithelial reticular cells arranged concentrically, filled with keratin filaments, and sometimes calcified

Spleen

  • The largest lymphoid organ in the body, interposed in blood circulation
  • Covered by a capsule that extends to form trabeculae
  • Trabeculae contain trabecular arteries and veins

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Description

Explore the functions and components of the human lymphatic system, including its role in drainage and the transportation of dietary lipids.

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