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Biolo 2230 > Unit 3-Lymphatic System Worksheet > Flashcards

Unit 3-Lymphatic System Worksheet Flashcards

1
Q

Describe the lymphatic vessels.

A

Vessels that contain lymph and collect at the back of the heart
flow in one direction

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2
Q

What is the purpose of lymphatic vessels?

A

Returning fluid back to the bloodstream

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3
Q

What kind of cells are CONTAINED within lymphoid tissues & organs?

A
  • Phagocytic cells

- lymphocytes

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4
Q

What is the purpose of lymphoid tissues and organs?

A

An immune purpose

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5
Q

T/F: In regards to lymphoid tissues & organs, only filtering of blood occurs.

A

False, some filtering for blood and some filtering of lymph occurs

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6
Q

Describe lymph.

A
  • Fluid in the lymphatic system; mechanism used to get blood back into the bloodstream
  • this fluid will leak out of capillaries and end up in interstitial space and then leak into lymphatic capillaries
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7
Q

Describe what lymph is contained in.

A

Lymph is contained within the vessels

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8
Q

Identify another substance that lymph is similar to

A

Lymph is a fluid that is similar to plasma

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9
Q

Describe the movement of lymph

A

Will be drained by veins and then return to circulation

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10
Q

What are the components of the lymphatic system?

A
  • Lymphoid tissues & organs
  • lymph
  • lymphatic vessels
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11
Q

Describe the fluid that can be found in interstitial. (Hint: answer in context of lymphatic vessels)

A
  • Fluid from interstitial space gets into lymphatic system and then will be pushed under low pressure
  • All of the fluid will then collect near the back of the heart
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12
Q

Where will the lymphatic vessels connect to blood vessels?

A

Near the back of the heart

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13
Q

What marcomolecule can be found in the fluid in interstitial space?

A

Proteins

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14
Q

What happens to the protein rich fluid that is in the lymphatic vessels?

A

The protein rich fluid that get into the lymphatic vessels will eventually get dumped into the circulatory system.

( This flow describes how we get proteins into circulation)

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15
Q

What does the protein rich fluid create?

A
  • Osmotic pressure, this pressure helps in the regulation of fluid that moves in and out of the blood capillaries.
  • Maintaining blood volume (blood volume links back to blood pressure)
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16
Q

T/F: Lymphatic vessels do not have a pump and function under super high pressure.

A

False: Lymphatic vessels do not have a pump BUT they function under LOW pressure

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17
Q

Describe the composition of lymphatic capillaries.

A
  • Small single cell layer of loosely overlapping endothelial cells( squamous et)
  • dead ended
  • Slightly larger than blood capillaries
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18
Q

Why are lymphatic capillaries leaky/permeable?

A

Because these cells LOOSLEY overlap one another.

19
Q

What purpose do collagen filaments serve regarding lymphatic capillaries?

A

Collagen filaments are going to anchor the lymphatic capillaries and hold these cells in place.

20
Q

Where do the lymphatic capillaries empty into?

A

Into lymphatic collecting vessels

21
Q

Describe the movement of fluid into the capillaries.

A
  • When pressure is higher in the interstitial space than the fluid inside the capillary -> fluid can then enter into the capillary
  • Pressure is created when there is a build up of fluid in the capillaries, these actions then cause the fluid to move foward
22
Q

Where are lymphatic organs found?

A

In digestive organs, NOT in bones or nervous system

23
Q

Under what conditions do the mini valves open or close?

A

Based on the amount of fluid/pressure

24
Q

T/F: Mini valves allow large proteins to move in.N

A

true

25
Q

Under what conditions will mini valves open under?

A

When interstitial fluid pressure is high

26
Q

Under what conditions will minivalves close?

A

When the interstitial fluid pressure is low

27
Q

What is the minivalve system>?

A

System allows for the cell to open and close. (this can occurs since one part of the collagen filament is attached and the other part of the filament)

28
Q

What are lacteals?

A

The lymphatic capillaries of the small intestines

29
Q

What does dead ended mean?

A

That flow occurs in only one direction

30
Q

Describe the lymphatic collecting vessels.

A
  • lymphatic capillaries merge here
  • Like veins thesse have thinner walls (where there is less tunica media)
  • they have three tunica
  • more valves than veins (these are important b/c there is low pressure here so have to keep from backing up)
31
Q

What is the major role of lymphatic trunks?

A
  • drain larger areas
32
Q

Describe lymphatic trunks

A
  • there are 5 major trunks which are named based on the areas that they drain
  • point where the lymphatic collecting vessels will empty into
33
Q

What is the site of absorption

A

Lacteals

34
Q

What substances go into the lymphatic capillaries of the intestines?

A

-Large fat

35
Q

Identify the process where blood cells exit the capillaries.

A

Diapedesis

36
Q

Identify the process where directioal movement of cells occurs in response to chemicals

A

chemotaxis

37
Q

What causes redness and heat of an inflamed area due to local hypermia

A

vasodilation

38
Q

During phagocyte mobilization involves what

A

Mainly macrophages and neutrophil migration into inflamed areas.

39
Q

List the events that are associated with inflammatory responses

A
  • vasodilation
  • phagocyte mobilization
  • increased vascular permeability
40
Q

What do activated T cells and marcophages release?

A

Cytokines

41
Q

Whys is the release of cytokines important?

A

Helps to mobilize cells and attract other leukocytes into the area

42
Q

What are natural killer cells (NK)?

A

Cells that have the ability to kill cancer/abnormal cells before the adaptive immune system is activated

43
Q

What do antigens do in regards to the adaptive immune response?

A

Antigens are a subatance that will activate the adaptive immune response

Biolo 2230 (12 decks)

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