Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
What two semi–independent parts make up the lymphatic system?
|
Lymphatic Vessels and Lymphoid Tissues and Organs
|
|
|
What are the lymphatic system functions?
|
1. It transports escaped fluids back to the blood
2. It plays the essential roles in body defense and resistance to disease |
|
|
What is Lymph?
|
Excess tissue fluid and plasma proteins carried by lymphatic vessels
|
|
|
What do lymphatic vessels form (similar to blood vessels)?
|
One–way system toward the heart
|
|
|
What weaves between tissue cells and blood capillaries in the lymphatic vessels?
|
Lymph capillaries
|
|
|
How are lymph capillaries structured for liquid to get in and out easily?
|
Walls overlap to form flaplike minivalves
|
|
|
How does fluid get into lymph capillaries?
|
Fluid leaks into lymph capillaries
|
|
|
What are lymph capillaries anchored to?
|
They're anchored to connective tissue by filaments
|
|
|
What on the inside of lymphatic capillaries cause minivalves to close?
|
Higher pressure
|
|
|
What collects lymph from lymph capillaries?
|
Lymphatic collecting vessels
|
|
|
What carries lymph to and away from lymph nodes?
|
Lymphatic collecting vessels
|
|
|
What returns fluid to circulatory veins near the heart?
|
Lymphatic collecting vessels
|
|
|
What drains the lymph from the right arm and the right side of the head and thorax?
|
Right lymphatic duct
|
|
|
What drains lymph from the body except for the right side of the head and thorax?
|
Thoracic duct
|
|
|
What is the "collection place" for the lymph drainage from the digestive organs?
|
Cicsterna chyli
|
|
|
What filters lymph before it is returned to the blood?
|
Lymph nodes
|
|
|
What harmful materials are filtered by the lymph nodes?
|
Bacteria
Viruses Cancer cells Cell debris |
|
|
What are the defense cells within lymph nodes?
|
Macrophages and Lymphocytes
|
|
|
What cell engulfs and destroys foreign substances such as bacteria, viruses, and foreign cells?
|
Macrophages
|
|
|
What responds to foreign substances in the lymphatic system?
|
Lymphocytes
|
|
|
What lymphatic organs contribute to lymphatic function?
|
Spleen
Thymus Tonsils Peyer's Patches |
|
|
What function does the spleen play in the lymphatic system?
|
Filters blood
Destroys worn–out blood cells |
|
|
How many days do RBC live for?
|
120 days
|
|
|
What function does the thymus gland play in the lymphatic system?
|
1. It functions at peak levels only during childhood
2. It produces hormones (such as thymosin) to program (mature) lymphocytes |
|
|
What does the hormone Thymosin (produced by the Thymus gland) do specifically?
|
It matures lymphocytes so they can carry out their protective roles in the body.
The programming enables the lymphocytes to distinguish our own cells from substances that are foreign to the body |
|
|
What function do the tonsils play in the lymphatic system?
|
They trap and remove bacteria and other foreign materials
|
|
|
What functions do the Peyer's Patches play in the lymphatic system?
|
They resemble tonsils in structure by capturing and destroying bacteria in the intestine
|
|
|
What does MALT stand for?
|
Mucosa–Associated Lymphoid Tissue
|
|
|
What are included in the Mucosa–Associated Lymphoid Tissue (MALT)?
|
Peyer's Patches
Tonsils Other small accumulations of lymphoid tissue |
|
|
What function do MALT's place in the lymphatic system?
|
They act as a sentinel to protect respiratory and digestive tracts
|
