Veins Flashcards
Why are muscles not essential to the function of viens but they are in arteries?
Veins are Low Pressure vessels
Arteries are High Pressure vessels
What is the general histological difference between veins and arteries?
Arteries are more developed the veins.
What is a neurovascular bundle?
The pairing of a Neuron, Artery, and Vein that travel together.
What are veins composed of?
Endothelial Cells
Tunica media
Tunica adventitia
What separates the tunica media and adventitia in a vein?
Nothing, elastic lamina only exists between layers of the artery.
Where are veins found?
Neurovascular bundles
What causes you to pass out when you lock your knees?
The collection of blood in the veins.
What percentage of circulating blood volume do capacitance vessels hold?
70%
What does it mean to say veins are more “variable” than arteries?
They slide and move around.
Why is infection a concern in venous circulation?
Pooling of blood can increase bacterial growth infecting throughout the venous circulation.
Where do valves arise from?
Tunica Intima
True or False valves exist in the venous areas of the head and neck?
False, valves do NOT exist in head and neck areas.
What is the function of the External Jugular Veins?
Drains a small portion of Extracranial tissues.
What is the function of the Internal Jugular Vein?
Drains the brain and most of the head and neck tissues.
How is blood collected in the venous collection system?
Both Jugular Veins merge with the subclavian vein to create a brachiocephalic vein and ultimately drain into the superior vena cava to dump into the right atrium.
True or False the facial vein is associated with the internal jugular vein?
True
Where does the facial vein collect from?
“Major Player”
(all kinds of things)
True of False the retromandibular vein is associated with the external jugular vein.
true.
What is the retromandibular vein created by?
Superficial Temporal + Maxillary Veins
Where does the retromandibular vein collect from?
posterior auricular vein
Where are the Venous Sinuses located?
In the Brain.
Where do the Venous Sinuses channel blood?
From the cerebral veins to the internal jugular.
What is the name of the condition that is associated with the Cavernous Sinus?
Cavernous Sinus Thrombosis
What occurs in the vein in Cavernous Sinus Thrombosis?
Bacteria gets lodged in the slow moving vein causing and infected clot.
Where (most likely) does the bacteria come from?
The veins that anastomose with the cavernous sinus drain the teeth.
What symptoms are associated with Cavernous Sinus Thrombosis?
Fever
Drowsiness
Diplopia
What is diplopia?
Double Vision
What nerve stops functioning causing diplopia?
Cranial Nerve 6
How does diplopia occur?
Swollen veins puts pressure on nerves causing the nerve to stop working.
