Lymphatic System Flashcards
Lymphatic capillaries are extremely ____ and they can therefore collect not only fluid but also proteins and even cells.
Porous
Specialized lymphatic capillaries participate in digestion by absorbing ____.
Lipids and lipid-soluble substances.
One of the major functions of the lymphatic system is to ____ the interstitial fluid.
Purify
One of the lymphatic systems tasks is to destroy cells which are not normally found in the body, but sometimes it is unsuccessful in destroying ____; it is not uncommon for these cells to invade the lymphatic tissue and begin to grow.
Cancer cells.
The fluid in the lymphatic system is called ____.
Lymph.
About 3 liters per ____ travels through the lymphatic system, compared with 5 liters per ____ through the circulatory system.
Day;
Minute
Lymph can flow in one direction because of ____ in the lymphatic vessels.
One-way valves.
Lymph is primarily propelled toward the site where it is returned to the blood by ____, although ____ in the vessel walls also participated.
The motions of the body;
Smooth muscles.
The smaller lymphatic vessels are called ____ and are essentially microscopic, dead-end tubes.
Lymphatic capillaries.
The lymphatic system collects ____ and ____ from interstitial regions and returns them to the blood.
Fluid;
Proteins
Endothelial cells that make up the lymph capillaries overlap loosely to form ____.
One-way valves.
Increased fluid pressure in regions surrounding lymph capillaries causes the overlapping regions of the cells of the capillaries to ____.
Separate.
High pressures in the lymph fluid within the lymphatic capillaries causes the overlapping regions of the cells of which the capillaries are made to ____.
Press together.
Lymphatic capillaries are prevented from collapsing as tissue fluid increases by anchoring ____ attached to the endothelial cells of the vessel.
Collagen filaments.
____ are specialized Lymph capillaries in the ____ of the small intestine.
Lacteals;
Villi
Most lymph in the body appears ____, but that in lacteals (called ____) is creamy white due to the high concentration of lipids.
Clear;
Chyle.
When several lymph capillaries merge, they form a(n) ____.
Lymph collecting vessel.
The walls of lymphatic collecting vessels, like those of blood vessels, have ____ tunics.
Three (3)
When lymphatic collecting vessels merge, they form ____.
Lymphatic trunks.
There are nine major lymphatic trunks: two each of the ____, ____, ____ and ____ trunks, and one of the ____ trunk.
Lumbar, jugular, subclavian; bronchimediastinal;
Intestinal.
When lymphatic trunks merge, they form the largest lymphatic vessels in the body, the ____. (There are only ____ of these in the body; in some individuals, the ____ one is absent and several trunks drain into the venous system directly.)
Lymphatic ducts;
Two;
Right.
Lymph from the legs, several abdominal organs and the lower torso enters the left lymphatic (a.k.a. Thoracic) duct via a dilated sac called the ____.
Cisterna chyli
The left and right lymphatic ducts drain into the left and right ____ veins, at their intersection with the ____.
Subclavian;
Jugular veins.
Blood is prevented from entering the lymphatic ducts by the presence of ____.
One-way valves.
