Chapter 16: Lymphatic System Flashcards
1
Q
what type of system is the lymphatic system?
A
closed ended
2
Q
3 functions of the lymphatic system
A
- defends body against diseases
- absorbs lipids from digestive system & transports them into bloodstream
- transports excess fluid away from interstitial spaces & returns it back to bloodstream
3
Q
important cells to lymphatic system
A
T cells & B cells
4
Q
lymphatic pathway
A
- lymphatic capillaries
- lymphatic vessels (afferent)
- lymph nodes
- larger lymphatic vessels (efferent)
- lymphatic trunks
- lymphatic collecting ducts
- subclavian veins in thorax
5
Q
lacteals
A
found in small intestine; specialized lymph capillaries that absorb lipids/fats & transfer them back to bloodstream
6
Q
capillaries
A
- microscopic, closed ended tubes
- thin walled
- networks parallel blood capillaries through body
- walls formed from simple squamous tissue
7
Q
vessels
A
- similar to veins, but thinner
- contain semilunar valves
- 3 layers
8
Q
3 layers of lymphatic vessels
A
- endothelial (inner)
- smooth muscle (middle)
- connective tissue (outer)
9
Q
trunk
A
- drain lymph from lymphatic vessels
- named for region they serve
10
Q
lymphatic trunks
A
- lumbar
- jugular
- subclavian
- bronchomediastinal
- intercostal
- interstitial
11
Q
collecting ducts
A
- drain lymph from trunks
- thoracic duct (large) and right lymphatic duct (small)
12
Q
the thoracic duct drains to
A
left subclavian vein near junction w/ left jugular vein
13
Q
the small right lymphatic duct drains to
A
right subclavian vein
14
Q
afferent vessel
A
leads to lymph node
15
Q
efferent vessel
A
leads away from lymph node
16
Q
lymph
A
interstitial fluid once its entered lymphatic vessels