Flashcards in Chapter21 Deck (40):
Endothelial cells have numerous fenestrae. Intestinal villi, ciliary of eyes, CNS plexus, glomeruli of kidneys
Large diameter. Little or basement. Large fenestrae, gaps between endothelial cells. Endocrine glands
Large diameter sinusoidal capillaries. Liver, bone marrow. Macrophages
Larger than sinusoidal capillaries. Spleen.
Allow blood to flow from arterioles to small veins without passing through capillaries
Ateriovenous anastomosis that consist of arterioles with abundant smooth muscle in their walls. Coiled, sheaths.
Sole of foot, Palm of hand, terminal phalanges, nail beds. Regulate temperature
Pathologic arteriovenous anastomoses
Result from injury or tumors. Direct blood flow from arteries to veins. Heart failure. Too much venous return
Tunics of arteries and veins
Tunica adventitia or externa
Vasoconstriction and vasodilation in...
Types of arteries
Thick tunica intima (elastic properties of wall) higher BP
Medium and small arteries. Constrict, dilate.
Transport blood from small arteries to capillaries. Constrict, dilate
Types of veins
Very small veins
Begin in primary capillary network, end in second capillary network.
Hepatic portal veins
Gastrointestinal tract and spleen to liver
Hypothalamohypophysial portal veins
Hypothalamus to anterior pituitary gland
Supply nutrients to arteries and veins themselves
Hardening of arteries. Degenerative
Deposition of material in the walls of arteries
Fluid, including blood, tends to flow through long, smooth walled tubes in a streamline fashion. Center is more rapid
Laminar flow is interrupted when fluid passes a restriction.
Measure of the force blood exerts against blood vessel walls
Measures blood pressure in millimeters of mercury
Tube that be inserted into a blood vessel and connecting a manometer or an electronic pressure transducer to it
Most often used to check blood pressure by professionals
Connected to blood pressure cuff
Blood flow vibrations in blood and surrounding tissues heard through stethoscope
First korotkoff sound
Second korotkoff sound
When the equation for resistance is combined with the equation for flow
A measure of a liquids resistance to flow
The percentage of the total blood volume composed of red blood cells
Critical closing pressure
The pressure below which the vessel collapses and blood flow through the vessel stops
The force that stretches the vascular wall is proportional to the diameter of the vessel times blood pressure
Arterial wall is weakened and bulges. May rupture.