Exercise 27 Flashcards
Arteries
Under high pressure, thick walled
Carries oxygenated blood away from heart
Pulmonary arteries
Carries deoxygenated blood
Arterioles
Small arteries
Capillaries
Smallest blood vessels
Materials can exchange
Venules
Small veins
Veins
Under low pressure, thin walled
Carries deoxygenated blood into heart
Pulmonary veins
Carries oxygenated blood
Blood vessel pathway
Artery -> arterioles -> capillaries -> venules -> veins
Myocardium
Cardiac muscle
Ligumentum arteriosum
Blood vessel closed in adults
Located between pulmonary trunk and aorta
Helped before lungs were developed
Atrium (R/L)
Upper ‘receiving’ chambers of heart
Atria (plural)
Ventricle (R/L)
Lower ‘pumping’ chambers of heart
Heart valve
Open when blood flows in right direction, closes to prevent blood flow in wrong direction
Tricuspid valve
Located between right atrium and right ventricle
Bicuspid valve
Located between left atrium and left ventricle