Arteries, Veins and Blood Pressure Flashcards
Between veins and arteries, which ones have valves?
Veins
Describe blood flow from the aorta to the inferior vena cava
- out of aorta to medium-sized artery
- then enters an arteriole
- then enters a capillary
- to venules
- medium sized veins
- inferior vena cava
Arteries have 3 layers while capillaries have
2
Arteries and ____ both have 3 layers.
Veins
What is the first layer of an artery and/or vein called? What is its function?
Tunica Externa
connective tissue sheath. Anchors vessel to the body
What is the second layer of an artery and/or vein called? What is its function?
Tunica Media
Smooth muscle. thicker in arteries. Helps control blood flow
What is the third layer of an artery and/or veins called? What is its function?
Tunica Interna
Smooth inner layer that repels blood cells and platelets. Prevents blood clots
Simple squamous epithelium
Arteries carry blood ____ from the heart while veins carry blood _____ to the heart.
Arteries = away from the heart Veins = back to the heart
Arteries have __________, which means they branch off into several vessels
bifurcations
Veins have _______, which means several vessels converge
anastosomes
Between arteries and veins, which one has low pressure? High pressure?
Low pressure = veins
High pressure = arteries
Arteries are mainly named after:
Bones, body region, organs which they pass by or carry blood to
Veins are mainly named after:
arteries or organs they travel next to
What types of vessels carry the most amount of blood during a resting state?
Veins (about 54%)
Which vessels see the most pressure?
Arteries, namely the aorta