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SUMMARY:10.4 Blood Vessels and Blood pressure
DTSTART;TZID=America/Los_Angeles:20260407T190000
DTEND;TZID=America/Los_Angeles:20260407T200000
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DESCRIPTION: Blood Vessel:
Beginning at the heart, the blood is pumped into elastic arteries, then to muscular arteries. From arteries, the body has a system of arterioles like branches on a tree that end in capillaries that surround body cells. Venous blood is transferred back from the capillaries into venules which unite to form muscular veins that empty into the great veins and thence to the heart. Only from capillaries can blood give up food and oxygen to tissues and receive waste products and carbon dioxide from tissues.
Coats of blood vessel walls

Tunica intima - endothelium - internal elastic lamina
Tunica media - smooth muscle - fibrous tissue - external elastic lamina
Tunica adventitia - fibrous tissue

Blood Pressure:
The pressure within the aorta is highest as the blood leaves the left ventricle at the end of the systole and lowest as the blood drains into the right auricle at the end of the diastole. Arterial blood pressure is measured in man by means of a sphygmomanometer.
The...

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