35.1 The Lymphatic System

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35.1 The Lymphatic System

• Olivia Karr
• Sarah Hudimac
• Tiffany Kantartzis
• Zach Thomas

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• Lymph fluid inside lymphatic vessels
• A colorless liquid, but after a meal, it appears
  creamy because of its lipid content.
• Collected lymph returns to a larger thoracic duct
  from the body.
• Movement of lymph in lymphatic capillaries is
  largely dependent on skeletal muscle
  contradiction.
• Lymphatic Vessels form a one-way system that
  begins with lymphatic capillaries.
• Construction of the larger lymphatic vessels is
  similar to the cardiovascular veins.
• Lymph gets pushed through these vessels.

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• lymph

Lymphatic vessels
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• Edema localized swelling caused by the
  accumulation of tissue fluid that has not been
  collected by the lymphatic system.
• This can happen if too much tissue fluid is made
  and/or if not enough of it is drained away.
• Can lead to tissue damage and eventual death.
• B Lymphocytes and T Lymphocytes type of white
  blood cells that play a pivotal role in the
  immunity.
• They are produced and mature in the primary
  lymphatic organs red bone marrow and the thymus
  gland.
• B cells mature in the bone arrow, but T cells
  mature in the thymus.

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Edema
B lymphocytes T lymphocytes
T
B
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• Red bone marrow site of stem cells, which are
  ever capable of dividing and producing blood
  cells.
• Common in children (most bones).
• In an adult its located in skull, sternum, ribs,
  vertebral column, femurs and humorous.
• B cells mature.
• Thymus gland located in the thoracic cavity
  between the trachea and sternum ventral to the
  heart.
• Largest in children and then shrinks as we get
  older.
• Not detectable in elderly.
• Connective tissues divide it into lobules, filled
  with T cells.

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Red bone marrow
Thymus gland
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• Lymph nodes mass of lymphoid tissue located
  alone course of lymphatic vessel.
• Ovoid structures occurring along lymphatic
  vessels.
• Cleans lymph.
• Connective tissue divides everything into
  nodules.
• Packed with B cells and contain a sinus.
• Spleen located in the upper-left side of
  abdomen stores and purifies blood.
• Has red pulp that filters blood.
• Consists of blood vessels and sinuses where the
  macrophages remove old and defective blood cells.
• Tonsils patches of lymphatic tissue located in
  pharynx.
• Perform same function of lymph nodes.
• Encounter pathogens and antigens first because of
  location.

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tonsils
spleen
Lymph nodes