Lymph System Flashcards
What do lymph vessels do?
transport fluid back into blood
Characteristics of Lymph vessels
- one-way straw-like vessels that take lymph fluid back to the heart
- weave. b/w tissues and capillaries and absorb leaked fluid ( lymph )
- extremely permeable and are low-pressure vessels
Tissue type of lymph vessels
simple squamous epithelial cells
Why are lymph nodes permeable?
so proteins, cell debris, bacteria, and viruses can enter
Can lymph capillaries get inflamed easily ( T/F )
True
How is Lymph returned back to the Nervous System
the Right lymphatic duct/thoracic duct.
What duct drain lymph from the
right arm + right side of the head + Thorax
right lymphatic duct
What duct drain lymph from the rest of the body?
thoracic duct
do both the r lymphatic duct and thoracic duct drain into the subclavian veins (t/f)
True
Which duct drains into the Right subclavian vein
R. Lymphatic vein
Which duct drains into the Left subclavian vein
Thoratic Duct
what does the lymphatic vessles rely on for transport
Skeletal pumps
How do lymph nodes protect the body
- removing foreign materials form lymph
- houses lymphocytes that work with immune sysyem
What do the macrophages in LN’s do
engulf and destroy bacteria + viruses + other pathogens in lymph
What do the Lymphocytes in LN’s do
respond to foreign substances in lymphatic fluids prior to returning to blood.
Lymph node characteriscts
- kidney shaped
- less than 1 inch long
- buried in CT
Where are LN found?
along Vessels
Where are concentrated parts of LN
Lingual
Axillary
Iiliac
Mesonteric
Mandibular
Lumbar
Popliteal
Cervical
Lana all in me makes love pretty cunt
What are swollen glands
swollen lymph nodes
What is trabecule
part of the fibrous capsule that divides the node into compartments
Characteristics of the spleen
- Soft
- blood-rich organ
- filters blood
what does the spleen filter
from
- Bacteria
- viruses
- other debri
what organ served as a site for
Lymphocyte proliferation + immune surveillance
spleen
what does swollen LN indicate?
- active infection
- resulting from trapping of lymphocytes and macrophages
what are the immune cells in speel responsible for
- destroying old RBC
- returning products liver for recycling
what does the spleen also store?
Platelets ( blood reservoir )
Purpose of speel in fetus vs adults
Fetus: a hematopoietic site
Adults: only makes lymphocytes
at what age is the thymus most active
youth
Where is the thymus located
low in the throat, overlying heart
Does the thymus shrink or grow as we age to adults
shrink
what hormone does the thymus make
thymosin
what does thymosin do
makes lymphocyte -> t- lymph and be a protective role
what are t-cell able to distinguish between
between seld and non self substances
what are tonsils?
small masses of lymphoid tissues that ring around pharynx
f(x) of tonsils
trap and remove bacteria/ foreign pathogens from entering the throat
Where are Lingual tonsils found
behind tounge
Where are Pharyngeal tonsils found
by nose
Where are Palatine tonsils found
back of throat
how does tonsillitis occur
when tonsils become congested with bacteria
Where are peyers patches located
in the distal part of the small intestine
where is the appendix located
worm-like offshoot of large intestine
What do pyers patches and appendix prevent?
prevent bacteria from penetrating intestinal wall. MALT
What is MALT
Mucosa-Associated Lymphoid Tissue
What does the MALT do
protects the GI tract
