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anatomy and physiology 2 Chapter 22: The Lymphatic System and Immunity $6.49   Add to cart
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  5. BIOL 3320

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anatomy and physiology 2 Chapter 22: The Lymphatic System and Immunity
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My document combines notes from class, the textbook, and videos about each chapter. Overall, I passed A&P 2 with a B using these notes. The note is lengthy, covering each section from the textbook chapter while highlighting key points discussed in class. It is typed out for easy reading, with handw...

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  • November 1, 2024
  • 60
  • 2023/2024
  • Class notes
  • Veronica fortino
  • All classes

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,
,• to provide an effective defense
• Lymphocytes, detect problems, and travel to them through the blood stream
• it eliminates local variation in the composition of interstitial fluid by distributing
hormones, nutrients and waste from the tissue of origin and circulates them
Random
• Lymphocytes can pass through capillaries
• The excess fluid from capillaries return to the bloodstream through lymphatic
vessels, which help transport lymphocytes and white blood cells to organs


Lymphatic vessels
• AK lymphatics
• Carry lymph from peripheral tissue to the venous system
• lymph first enters in lymphatic capillaries, and then drains into trunks and
ducky’s (larger major limbs, collecting vessels)
Lymphatic capillaries
• the lymphatic network begins with lymphatic capillaries which branch through
peripheral tissues
• Lined by endothelial cells, but the basement membrane is incomplete or
absent
• Endothelial cells are not found together tightly, but do overlap
• The overlapped area access a one-way valve, it permits, fluids, and solutes to
enter, along with viruses, bacteria and cell debris, but prevent them from
returning back to intercellular space
• They differ from blood capillaries; are closed at one end (blood caps are
continuous tubes), have larger diameters, have thinner walls, typically have
flattened or irregular outline under microscope
• found almost everywhere, except for areas without a blood supply like the
cornea.

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