Flashcards in (second midterm) Lecture 7 (4/25/16) PT. 1 Deck (36):
The cardiovascular system is derived from what germ layer? The Lymphatic system?
both derived from mesoderm
What is the main difference between the cardiovascular system and the lymphatic system?
The cardiovascular system has a pump and is a circuit, but the lymphatic system does not have a pump and is not a "loop" & have "terminal end"
The cardio & lymph systems both carry WBCs and plasma but the lymph system does NOT carry what?
Major functions of lymphatic system:
Collects excess water and proteins
Short term immune responses
Develops long term immunity
From where does the lymphatic system collect proteins?
2 types of lymphocytes:
produce specific antibodies
attack specific foreign cells
Places where we have a lot of lymph vessels:
Surface of skin
Near the mouth, eyes, nose
Near anus, urethra
Where are we doing most fat absorption?
How is the lymph circulated with no pump?
contraction of smooth muscle in larger vessels
squeezing action of skeletal system
dumps into venous system (connection "pulls" lymph along)
Over three-fourths of the body dumps into the _____________.
The thoracic duct dumps into what?
"venous drainage right at the notch of the jugular and subclavian coming together to make the brachiocephalic vein... on the left"
The thoracic duct begins as a loosely dilated sac that collects lymph from body. That sac is called...
the cysterna chyli
The thoracic duct goes through thorax and receives tributaries from...
left subclavian trunk
left jugular trunk
Lymph drainage is not the same on both sides. How is the right side drained?
The right lymphatic duct dumps into venous circulation at junction between right subclavian vein and right jugular vein (technically into right brachiocephalic vein)
What are the ducks and geese of the thorax?
...that's Sumida's joke, not mine........
Other lymphatic structures:
Scattered along lymph vessels are concentrated masses of lymph tissue called:
Macrophages and lymphocytes reside in the outer region of a lymph node, called...
What is the inner collecting area of a lymph node?
Afferent vessel vs. Efferent vessel
Afferent = coming in
Efferent = exiting
The efferent vessel leaves at the _______
Biggest lymphoid organ of body:
Different types of tonsils:
True or false: the spleen is highly vascularized.
In the spleen, what passes resident macrophages and lymphocytes?
In fetuses, what does the spleen produce? Does that change?
red blood cells
spleen is only called back into action under stressful conditions
What is the arterial supply to spleen?
(from celiac artery)
The thymus gland is ventral to what?
heart and laryngeal structures
The thymus has outer ______ and inner _______.
The cortex of the thymus contains many what?
The fetal thymus transforms undifferentiated lymphocytes from bone marrow into what?
Pyer's patches are also known as...
aggregated lymph nodes
Pyer's patches are common where?