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42 Cards in this Set

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  • Back
The lymphatic system is comprised of a network of what?
vessels that transport body fluids. Cells and chemicals in the vessels,organs and glands that produce them
Lymphatic vessels collect and carry away excess?
fluides
Teh organs of the lymphatic system help defend against what?
disease
The lymphatic pathways start where?
the lymphatic capillaries
The lymphatic capillaries merge to form what
larger vessels
larger vessels of the lymphatic system empty into the what?
ciculartory system
what are lymphatic capillaries?
tiny closed ended tubes that extend into interstitial spaces
lymphatic capillaries recieve tissue fluid though what
thier thin walls
once tissue fluid is inside the capillaries it is called what?
lymph
the walls of lymphatic vessels are thinner that those of what?
veins
Larger lyphatic vessels pass through what?
lymph nodes
larger lyphatic vessels pass through lymph nodes and merge to form what?
lymphatic trunks
what does the lymphatic trunk do?
drain lymph form the body
the lymphatic trunks join one of two what?
lymphatic collecting ducts
what are the two lymphatic collecting ducts?
thoracic duct or the right lymphatic duct
What blood vessels do the collecting ducts drain into?
The thoracic duct drains into the Left subclavian vein and the right lymphatic duct crains int the R subclavian
Lymph formation depends on what?
tissue fluid formation the more tissue the more lymp
A condition that interferes wiht the flow of lymph is?
adema
What are lymph nodes?
bean shaped modes with blood vessels, nerves and lymphatic vessesl attached
What does the sinuses of lymph nodes contain?
lymphacytes and macrophages
What do the lymphacytes and macrophages of the lymphnodes due?
clean the lymp0h as it flows throu the node.
What do the white blood cells within lymph do
filter lymph and remove bacteria and cellular debris before it returns to the blood
What is the center of lymphocyte production?
lymph nodes
What is the thymus?
soft bi lobed organ located behind the sternum
What shirnks in size during our lifetime and effects our protection
thymus
What is the bodies largest lymphatic organ? and where is it located
the spleen, upper left abdominal cavity
The spleen contains what instead of lymph?
Blood
What does the spleen do?
filters the blood and removes damaged blood cells and bacteria
what is the trail of lymph
L capillaries, l vessels, lnodes, l vessels, l trunk, collection ducts, subclavian circulatory vein system
What would happen with out a lymphatic system?
fluid would accumulate in tissue spaces
Walls of the lymphatic capillaries are
one celled thick therefore tissuefluid can enter the lyphatic capillaries
What is a semilunar valve?
valves in the lymphatic vessels
Thoracic duct differs from the Right lymphatic duct how?
Throacic is larger and longer receives lymph from lower limbs and
Lymph rejoins the blood and becomes part of the plasma in the
right and left subclavian veins
Tissue fluid originates from
blood plasma
The function(s) of lymph is(are) to
recapture protein molecules from the capillary bed transport foreign particles to lymph nodes
Movement of lymph is primarily due to
muscle contraction
Compartments within a lymph node contain dense masses of
lymphocytes
Functions of lymph nodes include
filtering foreign substances from lymph immune surveillance
Immune surveillance is provided by which of the following parts of lymph nodes?
macrophages and lymphocytes
Lymph flows only in one direction, toward the
heart
Phagocytic cells can leave the bloodstream by squeezing between the cells of blood vessel walls in the process
of diapedesis.