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Lymphatic System Structures and Functions

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Terms in this set (22)

  • Locations of the three tonsils

    The three tonsils are the pharyngeal tonsil (in the nasopharynx), palatine tonsils (on each side of the oropharynx), and lingual tonsils (at the base of the tongue).

  • What is tonsillitis?

    Tonsillitis is the inflammation or infection of the tonsils, often causing sore throat and difficulty swallowing.

  • What is appendicitis?

    Appendicitis is the inflammation of the appendix, a lymphatic structure attached to the large intestine, often requiring surgical removal.

  • What are lymph nodes?

    Lymph nodes are small, bean-shaped structures that filter lymph and house lymphocytes to help fight infection.

  • Name of lymph node in the armpit

    The lymph node in the armpit is called the axillary lymph node.

  • Name of lymph node in the neck

    The lymph node in the neck is called the cervical lymph node.

  • Name of lymph node in the groin area

    The lymph node in the groin area is called the inguinal lymph node.

  • Name of lymph node in the abdominal cavity

    The lymph node in the abdominal cavity is called the mesenteric lymph node.

  • What are the inward extensions of the lymph node capsule called?

    They are called trabeculae, which provide internal support within the lymph node.

  • Lymphocytes found where cortex meets medulla in lymph node

    T cells are primarily found where the cortex meets the medulla in the lymph node.

  • Lymphocytes and leukocytes in the medullary cords

    The medullary cords contain B cells, plasma cells, and macrophages.

  • Vessel that brings lymph into the lymph node

    Afferent lymphatic vessels bring lymph into the lymph node.

  • Vessel that drains lymph out of the lymph node

    Efferent lymphatic vessels drain lymph out of the lymph node.

  • Flow of lymph through a lymph node

    Lymph flows from afferent vessels into the node, through sinuses, and exits via efferent vessels.

  • Largest lymphoid organ and its location

    The spleen is the largest lymphoid organ, located in the upper left abdomen near the stomach.

  • Cells found in the red pulp of the spleen

    The red pulp contains red blood cells, macrophages, and platelets.

  • Leukocytes found in the white pulp of the spleen

    The white pulp contains mainly lymphocytes, including T cells and B cells.

  • Which pulp surrounds the central arteries in the spleen?

    The white pulp surrounds the central arteries.

  • Location and function of the thymus

    The thymus is located in the mediastinum and functions to mature T lymphocytes for immune defense.

  • Tissue replacing the thymus later in life

    The thymus is gradually replaced by adipose (fat) tissue with age.

  • Does immune function decline with age?

    Yes, immune function generally declines with age due to thymus involution and other factors.

  • What are thymic lobules (corpuscles)?

    Thymic lobules are structural units of the thymus containing cortex and medulla; Hassall's corpuscles are concentric epithelial structures found in the medulla.