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Ch. 22 Lymphatic System
Lecture Exam #6
28
Anatomy
Undergraduate 1
07/25/2011

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Term
What are the 3 functions of the lymphatic system?
Definition
1. Protection from foreign invaders
2. Picks up lost blood fluid
3. Picks up fat soluble materials before they go in blood
Term
The lymphatic tubules get ______ closer to the heart and ______ further away from the heart.
Definition
larger, smaller.
Term
What is the smallest tube in the lymphatic system?
Definition
Lymphatic capillary.
Term
Describe the structure of the lymphatic capillaries.
Definition
Dead end tubes and comprised of simple squamous epithelium.
Term
What is the function of the lymphatic capillaries?
Definition
Picks up fluid that was "kicked" out of circulatory system.
Term
What is lymph?
Definition
Fluid found in the lymph capillaries and is very similar to blood plasma except that it doesn't possess normal body cells; it contains abnormal body cells.
Term
what is the purpose of the lymph vessels containing valves?
Definition
Keeps lymph moving in one direction.
Term
Lymph vessels converge to form _____
Definition
Lymph trunks.
Term
What is the function of lymph trunks?
Definition
Collect lymph
Term
The lumbar trunk collects lymph in ______
Definition
lower extremities.
Term
The intestinal trunk collect lymph in ______ region.
Definition
Abdominalpelvic region.
Term
The thoracic duct/left lymphatic duct connects with what 3 trunks and then goes where?
Definition
Left jugular trunk, left subclavian trunk, left bronchiomediastinal trunk and connects to the left subclavian vein.
Term
The thoracic duct/left lymphatic duct function is what?
Definition
Transports lymph from the whole left side of body and right side lower extremities and right side abdominal region.
Term
What function does the right lymphatic duct have?
Definition
Transports lymph from right upper extremities.
Term
What does the lymphatic system do?
Definition
Takes fluid lost from the circulatory system and takes it back to the circulatory system. "recycling center"
Term
What is an afferent lymphatic vessel?
Definition
Brings lymph into the lymph node.
Term
What is an efferent lymph vessel?
Definition
Brings lymph away from lymph node.
Term
What does the lymph node do?
Definition
Cleans the lymph before it gets back to the circulatory system.
Term
What is the difference between a lymph node and lymph nodule?
Definition
Lymph nodes have a capsule. Lymph nodules do not.
Term
Tonsils are what kind of lymph structure?
Definition
Lymph nodule.
Term
What is an adenoid?
Definition
Swollen tonsil.
Term
What cells mature in the thymus gland?
Definition
T-Cells
Term
What is the function of the thymus gland?
Definition
Teaches the t-cells what to attack and not to attack.
Term
What happens if the t-cell doesn't learn properly? Why?
Definition
It gets destroyed. It prevents autoimmune diseases.
Term
Why does your thymus gland shrink as age progresses?
Definition
Because when you are an infant your being introduced to all sorts of pathogens. So the thymus gland needs to learn these pathogens. Midlife you've already encountered almost all the pathogens your ever going to encounter. So it's not absolutely necessary to keep the thymus big.
Term
Where is the spleen located?
Definition
Upper left quadrant of the abdomen between the rib cage and stomach.
Term
What is the spleen's function?
Definition
Filter blood, removes old, worn-out RBC's; also a blood resevoir, in times of need spleen contracts and expels blood to the circulatory system.
Term
Why is it dangerous if your spleen bursts?
Definition
B.c it's a blood resevoir you would die from internal bleeding.
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