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Lymphatic System

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Circulatory. System. Function. 1. Collects fluid lost from ... B. Lymph vessels structures that collect lymph and deliver it back to the circulatory system ... – PowerPoint PPT presentation

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Title: Lymphatic System


1
Lymphatic System
Notes
  • Chapter 37
  • Section 2

2
Lecture Outline Lymphatic System
PowerPoint Notes
textbook questions
Keys
3
Crucial in helping the body ward off disease and
heal from injury
Advanced infection from poor circulation
4
The lymphatic system is closely linked to several
other systems
But especially to the Circulatory System
5
Function
  • 1. Collects fluid lost from the blood and returns
    it to the circulatory system
  • More than three liters of fluid leave the
    capillaries each day
  • This continually bathes the cells
  • There is twice as much lymph in the body as blood
  • Lymph is dumped back into the circulatory system
    thru the superior vena cava

6
Functions contd
  • 2. Filters fluid to rid it of bacteria and other
    pathogens

7
More Functions
  • 3. Collects fat from the small intestine and
    delivers it to the circulatory system
  • 4. Generates and stores WBCs called
    lymphocytes that fight infection

Notice the location of the nodes
8
Components of the Lymphatic System
  • A. Lymph fluid collected in lymph vessels
  • Clear straw colored fluid same basic component
    as plasma

9
  • B. Lymph vessels structures that collect lymph
    and deliver it back to the circulatory system
  • Valves within keep the lymph moving in one
    direction

10
  • C. Lymph nodes series of cleaning filters
  • Lymph moves slowly through the nodes
  • WBCs attack and engulf bacteria and pathogens
    in nodes

11
  • Location of vessels and nodes

12
Nodes swell when large numbers of pathogens are
trapped
  • The swelling can cause pain like a sore throat
  • Have you ever had tonsillitis?

Did it look like this?
13
Edema
  • Swelling of tissues due to excess fluid
    accumulation
  • Caused by disease or injury

14
  • Elephantiasis
  • a condition of extreme edema that occurs when
    lymph vessels become blocked by filarial worms.
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