U2 CH21 Lymphatic System (A&P2)

• Primary Lymphatic Structures:


  Thyums, & Red bone barrow
• Secondary Lymphatic Structures:


  Tonsils, lymph nodes (cervical and axillary, inguinal), spleen, MALT (mucosa-associated lymphatic tissue in small intestine)
• Flow of Lymph in order:

  Capillaries - lymphatic vessels - lymphatic trunk - lymphatic duct - R & L subclavian veins
• How much fluid does the lymphatic capillaries reabsorb?

  15%
• What does interstitial fluid contain?

  Water, dissolved solutes, debris (dead cells), sometimes foreign material

  (Other 85% goes to circulatory sytem)
• Onces fluid enters lymphatic system, it is called what?


  Lymph
• Fluid Nomenclature:

  1. Fluid in blood:
  2. Fluid in lymphatics:
  3. Fluid between cells in tissue:


  1 - Plasma, 2 - Lymph,

  3 - Interstitial Fluid
• Some lymphatic vessels directly connect to...

  Lymph nodes
• Lymphatic trunks collects lymph from lymphatic vessels of a ____ region.

  Body
• Right lymphatic duct is where?


  Right subclavian vein (right side of face, thoracic region, and right arm)
• Thoracic duct is where?


  Left subclavian vein (rest of the body)
• Lymphedema


  Accumulation of interstitial fluid due to obstruction of lymphatic drainage
• Hemopoiesis happens in...


  Red bone marrow
• _ never mature in the red bone marrow

  T-Cells (they travel and mature in Thymus)
• Thymus is _ in children and _ in adults

  Large; Small
• Cortex of Thymus: _ T-Cells

  Medulla of Thymus: _ T-Cell


  Immature;

  Mature
• Purpose of lymph nodes:

  • Clean and filter the lymph
  • Immune activation
• Lymph nodes house a bunch of what cells?

  T-Cells & B-Cells
• Cleaning of lymph via lymph nodes in order

  1. Lymph flows in to afferent lymphatic vessels.
  2. Lymph flows through sinuses
  3. Lymph flows out via efferent lymphatic vessel & eventually into cardiovascular system
• Which cells mostly exist in cortex of lymph nodes

  B-Cells & T-Cells
• Lymphatic Nodules:


  Circular structures in cortex of lymph nodes (House T-Cells & B-Cells)
• What's the largest lymphatic organ?

  Spleen
• How much percent does red pulp in spleen reserve? (Platelet reservoir)

  30%
• MALT is very prominent in what organ? And what is it called?


  Intestine;

  Peyer's Patches