4.02 - Blood Vessels Flashcards
What carries blood away from the heart
Arteries
Arteries become _________ as they branch and lead to _________
Smaller, capillaries
_________ return blood to the heart
Veins
Veins become _________ as they merge and approach heart
larger
An _________ is a convergence of two or more vessels that normally diverge
Anastosmosis
What arteries give only a single way to reach an organ
End arteries
Do end arteries anastomose?
No
What arteries anastomose but it is tiny and insignificant
Functional end arteries
_________ arteries are arteries and veins that lie next to each other
Companion
________ _________ are a pair of veins that accompany an artery
Vanae comitantes
Axillary artery and vein are an example of _________ vessels
companion
Brachial arteries are an example of _________ _________
Venae comitantes
Tunica intimia is composed of
- endothelium (_________ _________ lining)
- Subendothelial layer of _________ CT
Simple squamous
Areolar
Tunica media
- Comprised of circularly arranged _________ muscle
_________ activity causes muscle to contract resulting in _________
Smooth
Sympathetic, vasoconstriction
Tunica externa
outer CT that helps _________ blood vessels to surrounding
large blood vessels require _________ _________
- Their own network of blood small vessels on outer layer
anchor
Vaso vasorum
Capillary walls only contain _________ _________ with the basement membrane
Tunica intima
Arteries are _________ than companion vein lumen
Narrower
Veins are _________ than artery lumen
Wider
Arteries are veins are (thicker or thinner)than companion vein
thicker
Veins are (thicker or thinner) than companion artery
Thinner
The thickest tunic in artery is
Tunica media
The thickest tunic in vein is
Tunica externa
Do arteries have valves?
No
Do veins have valves?
Yes
Blood pressure is higher in _______ than _______
Arteries, veins
Systemic arteries transport blood _______ in oxygen
Pulmonary arteries transport blood _______ in oxygen
Hight
Low
Systemic veins transport blood _______ in oxygen
Pulmonary veins transport blood _______ in oxygen
Low
High
In tunica _______, arteries appear wavy because of smooth muscle contraction
Intima
In tunica intima, _______ appear wavy because of smooth muscle contraction
Arteries
In tunica intima, veins appear _______
Flat
In internal elastic lamina, _______ is absent
_______ is present
Veins, artery
In external elastic lamina, arteries are present in _______ and _______ arteries
Veins are _______
Medium, large
Absent
Capillaries are the _______ blood vessels
Diameter only slightly larger than _______
Allows _______ exchange between blood tissues
Smalles
Erythrocyte
Metabolic
In mesentric circulation, each capillary bed is fed by a _________
Several true capillaries branch from the bulk of the capillary bed
Metarteriole
The origin of each true capillary has a _________ _________ of smooth muscle around it that controls blood
Centrally metartriole continues distally to _________ _________ which connects to _________ _________
Precapillary sphincter
Thoroughfare channel, postcapillary venule
In continuous capillaries, _________ cells form a complete lining aided by _________ junctions
Endothelial
Tight
What is the most common type of capillary and is in muscles and brain
Continuous
Fenestrated capillaries: endothelial cells. contain _________ that allow fluid exchange between _________ and _________ fluid
pores, blood, interstitial
What type of capillary is in small intestine and kidney
Fenestrated