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LYMPHATICS OF THE HEAD AND NECK - UNIT 2
Terms in this set (30)
What are the three main functions of the lymphatic system?
1. It picks up protein molecules from tissue fluid which are too large to pass through capillaries and transports them tot he bloodstream
2. it returns excess tissue fluid to the blood stream
3. produces lymphocytes
What are lymph nodes?
swelling found along the lymphatic system
What do lymph nodes produce and act as?
produces lymphocytes and act as filters for the lymph, preventing foreign bodies from entering the bloodstream
What do the afferent lymph vessels do?
drain lymph TO a node
What do the efferent lymph vessels do?
drain lymph FROM a node
What are two clinical phenomenons in regards to moving lymph?
1. exercise clears toxins from tissues (help with metabolizing)
2. health benefits of message
What are the superficial nodes of the head?
What are the superficial nodes of the neck?
3. anterior cervical
4. superficial cervical
Where are the deep cervical nodes are located?
within the carotid sheath and follow the course of the internal jugular vein
What are the two largest deep cervical nodes>
1. jugulodigastric node
2. jugulo-omohyoid node
What does the jugulodigastric node do?
drain the tongue (also drains palatine tonsils)
Where is the jugulodigastric node found?
near the posterior belly of the digastric muscle
What tonsil is enlarged with tonsilitis?
the palatine tonsils
What does the jugulo-omohyoid node do?
drains the tongue
Where is the jugulo-omohyoid node found?
near the intermediate tendon of the omohyoid
How do all lymphatics of the head and neck drain into the deep cervical nodes?
directly or indirectly
What do the efferents of the deep cervical nodes form?
the right and left jugular trunks
What does the right jugular trunk do?
drains into the junction between the internal jugular and subclavian veins
What does the left jugular trunk do?
drains into the thoracic duct
What is the lymphatic system very important for tracking for?
the spread of cancer cells
Describe the submental nodes.
afferent of the submental nodes drain the central portions of the lower lip, the floor of the mouth, and the tip of the tongue
Describe the submandibular nodes.
afferents of the submandibular nodes drain the cheek, the side of the nose, the upper lip, the lateral part of the lower lip, the gums, and the margin of the tongue
The spread of cancer follows thelymphatics which drain which affected region?
cancer of the central part of the lip will follow a different path than cancer of the lateral part of the lip
What is lymphogenous metastasis?
the spread of cancer via the lymphatic system
What is a signal node?
- an elarged supraclavicular node, usually on the left side
-often the first indication of a visceral tumor of the thorax or abdomen
What is a lymphoma?
-a primary tumor of the lymph nodes
What is Hodgkin's diseases?
a type of lymphoma
-used to be lethal, now it can be managed based on cell type
-less aggressive than non-hodgkin's
What is non-hodgkin's lymphoma?
another type with a poorer prognosis
What happens in diagnosis of lymphoma?
an enlarged lymph node:
1. tender or painful - indicates infection
2. hard and painless - indicates cyst development or cancer
What is filariasis?
a parasitic infection of the lymphatic system (worms)
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