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BLOOD VESSELS
STUFF
25
Anatomy
Undergraduate 4
12/18/2011

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Term
THREE TYPES OF BLOOD VESSELS
Definition
ARTERIES CAPILLARIES AND VEINS
Term
ARTERY
Definition
RICH 02 THICK WALL
Term
CAPILLARY
Definition
EXCHANGE OF GASES
Term
VEIN
Definition
O2 POOR, THIN WALL
Term
LAYERS IN TYPICAL BLOOD VESSEL
Definition
INSIDE TO OUTSIDE
TUNICA INTIMA
-ENDOTHELIUM
-SUBENDOTHELIAL LAYER
- INTERNAL ELASTIC LAMINA
TUNICA MEDIA
-EXTERNAL ELASTIC LAMINA
TUNICA EXTERNA
Term
VESSEL TYPES
Definition
ELASTIC ARTERY (AORTA AND FIRST MASSIVE BRANCHES)
MUSCULAR ARTERY MOST ARTERIES, LARGE WALL SUPPORT
CAPILLARY
VEIN THIN WALLS (LESS PRESSURE THAN ARTERIES)
Term
VESSEL AND SPECIAL FEATURE LAYERS
Definition
ELASTIC TUNICA INTIMA, THICK LAYER OF TUNICA MEDIA, MANY ELASTIC SHEETS, AND HAS TUNICA EXTERNA
CAPILLARY. ONLY HAS A TUNICA INTIMA LAYER
VEIN. TUNICA INTIMA FORMS VALVES, THINK TUNICA MEDIA, TUNICA EXTERNA IS THE THICKEST LAYER FOR SUPPORT
MUSCULAR ARTER HAS TUNICA INTIMA, LITTLE OR NO ELASTIN, BUT TUNICA MEDIA IS THICKEST LAYER, HAS TUNICA EXTERNA
Term
MUSCULAR ARTERIES
Definition
INSIDE LINED BY EPITHELIUM, TUNICA MEDIA IS A SMOOTH MUSCLE AND DETERMINES WHERE BLOOD GOES.
Term
ATHEROSCLEROSIS WHERE IT AFFECTS
Definition
IT AFFECTS THE TUNICA INTIMA, PLAQUE OBSTRUCTS
Term
ANEURYSMS
Definition
WEAKENESS IN THE WALL OF A VESSEL, BALLOONS OUT AND GETS WEAK. RUPTURE ELEADS TO SIGNIFICANT BLOOD LOSS. SO PUT IN GRAFT/STENT TO PREVENT RUPTURE BY DECREASING PRESSURE ON WALL OF VESSEL.
Term
BLOOD FLOW THROUGH VEINS
Definition
RELY ON POSITION BETWEEN MUSCLES, SO THEY CONTRACT AND COMPRESS VEINS
VALVES TRAP SO NO BACKWARDS BLOOD FLOW.
RETURN TO HEART.
Term
VARICOSE VEINS
Definition
ARE ENLARGED VEINS WHEN VALVES FAIL AND BLOOD POOLS IN VEINS, PAINFUL
Term
THREE TYPES OF CAPILLARIES
Definition
CONTINUOUS
FENESTERATED
SINUSOIDAL/DISCONTINUOUS
Term
CONTINUOUS CAPILLARIES
Definition
ATTACHED TIGHTLY BY JUNCTIONS, NO HOLES, FOR TIGHT CONTROLLED EXCHANGE CNS MUSCLE TISSUE
Term
FENESTRATED CAPILLARIES
Definition
INTERMEDIAL XCHANGE
HOLES IN ENDOTHELIAL WHERE FREER EXHCANGE IS POSSIBLE IF NECESSARY.
ENDOCRINE GLANDS
AND THE KIDNEY
Term
DISCONTINUOUS/SINUSOIDAL
Definition
LEAKIEST
RBC'S
SPLEEN
LIVER
Term
CONTROL OF CIRCULATION VIA CAPILLARY BED TO LOCATIONS THAT NEED THE MOST O2
Definition
SPHINCTERS OPEN, BLOOD FLOWS THROUGH CAPILLARIES
SPHINCTERS CLOSED, BLOOD FLOWS THROUGH THOROUGHFARE CHANNEL. (BIPASSES CAP BED)
Term
PORTAL SYSTEM
Definition
ARTERY, CAP BED, VEIN, CAP BED, VEIN DELIVERS BLOOD TO TISSUES AROUND THIS SPECIFIC LOCATION.
ONLY OCCURS IN PITUITARY PORTAL SYSTEM AND HEPATIC PORTAL SYSTEM
Term
THE PITUITARY USES A PORTAL SYSTEM
Definition
TO AFFECT A SYSTEM VIA BLOODSTREAM
Term
THE HEPATIC PORTAL SYSTEM
Definition
PURPOSE IS TO DETOX BLOOD SO DOESN'T DESTROY SURROUNDING TISSUE
Term
collateral circulation
Definition
alternative ways to deliver blood to diff regions of body
if 1 vessel is blocked blood can still get to the region by an alternative route
not all regions of body have this, but most do.
Term
blood pressure
Definition
pressure blood exerts against arterial wall
Term
which vessel is commonly used to measure blood pressure
Definition
brachial artery
Term
systolic and diastolic pressure
Definition
systolic is first bp number, blood comes through
diastolic pressure is no turbulence in flow, nice and slow. -120/80 is typical. 140/85 is high BP risk for altherosclerosis
Term
hypertension
Definition
elevated high BP
silent killer.
treated with a variety of medications
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