Anatomy Of The Lymphatic System Flashcards
What are its components + examples?
Lymphatic vessels - capillary beds + larger vessels
Diffuse+defined lymphoid tissue - tonsils or Peter patches
Lymphoid organs - spleen or thymus
Label lymphatic system
On OneNote
Define cervical
Neck region of spinal column
Whats the mandible
Largest and strongest face bone - lower jaw bone
Define axiliary
Near armpit
What are subclavian veins
Deep vein - moves o2 in blood from upper body to heart
Cisterns Chyli - what are they ? What’s special about it ?
Dialated sack near central breastbone - receives lymph from right and left lumbar truncks including GI tract - most but not all people have it
Are there lymph vessels in brain ? Where? What do they line?
Yes- in meninges - tiny - line rural sinuses
What can these vessels carry ? Which nodes are they connected to?
Fluid
Immune cells
from cerebrospinal fluid
Connected to deep cervical lymph nodes
What’s are the roles of this system ?
Drains excess extra cellular fluid - homeostasis of body fluids and plasma proteins
Transported triglycerides and fat soluble vitamins (KEDA)
Initiates + carries out specific immune response
How much fluid 1) filtered out from arterial end?
2) reabsorbed by venous end?
3) how much is left and where does it go?
1) 20 L out
2) 17 L in
3) 3L in lymphatic capillaries
What kind of system is the lymphatic system? WHy?
Open system - defines start in cell interstitium
What’s the structure of lymphatic vessels?
Like veins but w thinner walls , more valves for unidirectional flow
Whats the composition of lymph
Like blood plasma but vary in protein/lipid content
What’s chyle and how is its composition distinct from body lymph
Lymph from gastro-intestinal tract - esp rich in lipids (mainly triglycerides)
What are lacteals, and where do they follow along
Lymphatic vessels that collect chyle - don’t follow veins but along superior mesenteric artery
What role does the thoracic duct have
Lymph drains into it - biggest lymphatic vessel - connects to junction between left jugular and left subclavian vein - collect lymph from entire body except top right
where does thoracic duct flow, and what does the flow of lymph in it depend on ?
- runs from aortic opening in diaphragm to root of neck
-thoracic pump drives flow
Whats the role of the right lymphatic duct
Lymph from top right corner drains into it -drains into junction of right jugular and subclavian vein.
What’s lymphoedema ? Types?
WHat are the 2 ways to develop it?
All the ways to develop the second type ? (3)
Accumulation of lymph in body part - results in swelling.
Primary = congenitally inherited - malformed or absent lymphatic vessels
Secondary = increased BP - excess lymph produced, obstruction of lymphatic vessels due to parasites or lesions , lack of skeletal muscle contraction (e.g. paralysis).
What are lymphoid tissues?
4 places where they are most common?
- what’s distinct about these places?
- tissue producing lymphocytes / antibodies
-gastrointestinal tract/ appendix
-urinary tract
-reproductive tract …….
What are tonsils ?
4 location ?
How does size vary with age?
Label diagram on their location on OneNote ?
- collection of lymphoid tissue, covered w mucous membrane
1) adenoid (nasopharyngeal)- nasal cavity/auditory tube
2) Tubal - nasal cavity/auditory tube
3) Palatine- oral cavity/pharynx
4) Lingual (facial) - larynx/oesophagus
1 and 3 atrophy w puberty - max size in early childhood
How can a certain type cause breathing issues?
What about deafness/ recurrent otitis media ?
1) if palatine / adenoids grow excessively = block posterior nasal openings
2) due to inflammation of tubal tonsils near auditory tube
What is recurrent otitis media?
Middle ear infection
