Blood Vessels Flashcards
(14 cards)
Arterial System
arteries carry blood away from the heart
arterioles
a.k.a. the resistance vessels
Venous Systemcarry
carry blood to the heart
Blood Vessel Walls have
3-layered arrangement surrounding the lumen
Tunica Intima
inner layer - simple squamous epithelium (called endothelium) and a CT basement membrane
Tunica Media
middle layer - contains elastic fibres and smooth muscle
Tunica Externa
a.k.a. tunica adventitia
Vasoconstriction
a decrease in lumen size
Vasodilation
an increase in lumen size
Arteries
stretch to accommodate blood flow, recoil which helps force the blood forward
Arterioles
blood flow regulation, significant effect on
blood pressure
Capillaries
microcirculation, nutrient and waste exchange
Venules
blood flow from capillaries to veins
Veins
transport blood to the heart, little smooth muscle and less elastic CT
