Chapter 13 Lymphatics Anatomy Flashcards

1
Q

Which lobe of the lung does NOT drain into the right (minor) duct?

A

Left upper lobe

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2
Q

What drains into the right (minor) duct?

A

Right UE, right hemicranium, heart and lobes of lung (except left upper lobe)

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3
Q

Where does the right (minor) duct drain into?

A

Right brachiocephalic vein OR junction of right IJV and subclavian vein

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4
Q

Where does the left (major) duct drain into?

A

Junction of left IJV and subclavian veins

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5
Q

Where does the thoracic duct traverse?

A

Sibson’s fascia of the thoracic inlet up to the level of C7 before turning around and empyting into the left (major) duct

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6
Q

Where does the right (minor) duct traverse?

A

Only traverses the thoracic inlet once

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7
Q

Infection of the right toe would drain where?

A

Left (major) lymphatic duct

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8
Q

What drains directly into the thoracic duct and bypasses LNs?

A

1) Thyroid
2) Esophagus
3) Coronary and triangular ligaments of liver

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9
Q

What has prelymphatics?

A

Superficial skin, deep portions of peripheral nerves, endomysium, and bones (Haversion canals)

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10
Q

2/3 of lymphatic fluid is produced where?

A

Liver and intestines

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11
Q

What is the de facto lymph of the CNS?

A

CSF

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12
Q

What level is the cisterna chyli?

A

L2

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13
Q

Where does the thoracic duct cross the diaphragm?

A

Aortic hiatus (T12)

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14
Q

When is the lymphatic system developed in utero?

A

By the 3rd month

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15
Q

What has more valves, lymphatics or veins?

A

Lymphatics–semilunar

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16
Q

What has “flap valves”?

A

Terminal lymphatic capillaries–allows fluid to enter

17
Q

How does interstitial fluid enter the terminal lymphatic vessels?

A

Micropinocytosis

18
Q

What is the lymphatic return to the heart in a day?

A

Entire volume of serum of body

19
Q

How much extracellular fluid is carried from interstitium to the blood per day?

A

10-20% or 3 liters

20
Q

What do the intestinal lymphatics absorb?

A

Long chain fatty acids, chylomicrons, and cholesterol

21
Q

What are the main cells found in lymph?

A

Lymphocytes

22
Q

What is the innervation of lymphatics?

A

SNS (just like vasculature)

23
Q

What does SNS stimulation do the lymphatics?

A

Initially causes increased peristalsis, long term hyperSNS tone decreases overall mvt of lymph

24
Q

What is the SNS control to the lymphatic duct?

A

Intercostal nerves

25
Q

What innervates the cisterna chyli?

A

T11

26
Q

What is interstitial fluid pressure and flow rate?

A

-6.3mmHg, rate of 120cc/hr

27
Q

What if interstitial pressure increases (closer to 0mmHg)?

A

Increased absorption into lymphatics

28
Q

What happens if pressure gets above 0mmHg?

A

Lymphatics collapse–decrease in lymphatic drainage

29
Q

What factors increase interstitial pressure above 0mmHg?

A

1) Systemic HTN
2) Cirrhosis (decreased plasma protein synthesis)
3) Hypoalbuminemia assoc with starvation
4) Toxins such as rattlesnake poisoning