BIOS 255 EXAM 2 - –Answer -largest arteries by diameter -contai...

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BIOS 255 EXAM 2

• Characteristics of Elastic arteries(Conducting arteries)

–Answer -largest arteries by diameter -contain more elastic fibers than smooth muscle -conduct blood from the heart to the more distant muscular arteries -pressure reservoirs

• Muscular arteries(distributing arteries)

–Answer -Distribute blood to various parts of the body -Contain large amounts of smooth muscle, most named arteries in the body fall into this category

• Characteristics of Arterioles

–Answer -smallest arteries by diameter -deliver blood to the capillaries, where gas and nutrient exchange can occur -Control amount of blood to various organs

• Characteristics of Venules

–Answer -smallest veins -collect blood from the capillaries -contain venous valves which prevent the backward flow of blood -attached to capillary bed

• Characteristics of Veins

–Answer -contain valves -Carry blood back to heart 1 / 2

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-hold the most blood(blood reservoirs) -rely on the following to return blood to the heart –Answer vasoconstriction, valves, skeletal muscle pump, respiratory pump, and cardiac suction -thinner tunica interna and media; thicker externa

• lymphatic system functions

–Answer -Immunity -Lymph formation -Fluid balance -Transport lipids

• List the organs of the lymphatic system

–Answer Lymphatic organs - Non-moving structures that work to house lymphatic tissue Primary –Answer

-Red bone marrow -Thymus Secondary –Answer

-Lymph nodes -Tonsils -Spleen

• Describe Red bone marrow

–Answer -involved in hematopoiesis (blood formation) and immunity

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