lab practical 2 Flashcards
What is the order of oxygenated blood from the heart to the capilarys
Aorta -> Artery -> arteriole -> capillaries
What is the order of oxygenated blood from the heart to the capilarys
Aorta -> Artery -> arteriole -> capillaries
What is the order of de-oxygenated blood from the capillareis back to the heart
Capillaries -> venules -> veins -> vena cava
What are the two circulation systems?
Systemic and pulmonary
Which circulatory route has arteries that CONTAIN O2 and veins have NO O2
Systemic circulation
Which circulatory route has arteries that CONTAIN O2 and veins have NO O2
Systemic circulation
Which circulatory route has veins that CONTAIN O2 and arteries have NO O2?
pulmonary circulation
Which circulatory route has veins that CONTAIN O2 and arteries have NO O2?
pulmonary circulation
What are the three types of vessels?
arteries (elastic, muscular, arterioles), capillaries, veins (venules)
What are the layers of the vessels?
Tunica Eterna, Tunica Media, Tunica interna (intima)
What are the layers of the vessels?
Tunica Eterna, Tunica Media, Tunica interna (intima)
What layer of the vessels contains elastic and collagen fibers, and supports and protects?
Tunica Externa
What layer of the vessels contains elastic and collagen fibers, and supports and protects?
Tunica Externa
Which layer of the vessel is the thickest?
Tunica Media
What type of fibers does the tunica media contain?
elastic and smooth muscle fibers that encircle diameter of vessel
What is the tunica media regulated by?
sympathetic nervous system
Is the tunica media thicker or thinner in veins?
thinner
What layer of the vessel contains simple squamous epithelium, and elastic tissue?
Tunica Interna
What would cause plaque formation in the tunica interna?
Damage to endothelium -> platelets stick to wall -> plaque formation
Which type of artery is large diameter and have more elastic fibers in the tunica media than other arteries?
Elastic arteries
What type of artery is aorta and pulmonary arteries?
Elastic arteries
Which type of artery is smaller in diameter, has more smooth muscle and fewer elastic fibers?
Muscular
Which type of artery is smaller in diameter, has more smooth muscle and fewer elastic fibers?
Muscular
How does Muscular arteries control blood flow to different areas of the body?
vasoconstriction and vasodilation
Which artery control blood flow into capillaries and play a very large role in controlling blood pressure?
Arterioles
What structure receive blood from capillaries and drains into veins?
venules
What structure receive blood from capillaries and drains into veins?
venules
What two things does venules contain?
Contain tunica interna (endothelium) & tunica media (few smooth muscle fibers)
What two things does venules contain?
Contain tunica interna (endothelium) & tunica media (few smooth muscle fibers)
Which structure contains tunica interna, media and externa and contains fewer smooth muscle fibers and elastic fibers than arties?
Veins
What does artery’s contains that veins to do not?
elastic external or internal elastic lamina
What is the structure in the vein that prevents back flow of blood?
Valves
What is varicose veins?
faulty valves allow back flow and pooling of blood
What structure allows for RBC single file?
Capillaries
What is capillaries made up of?
single layer endothelial cells supported by a basement membrane
In capillaries what are the fusion of plasma membranes of adjacent cells?
tight junctions
what does tight junction allow?
only allow lipid soluble or membrane carrier-contain substances to pass
In capillaries what are the spaces between cells?
intercellular clefts
In capillaries what allows substances to pass through capillary walls (tanscytosis)?
vesicles
In capillaries what are the pores in plasma membrane that is covered by thin membrane?
fenestration (windows)
What does blood pressure do?
drives plasma out of capillaries, which then is interstitial fluid
What does blood osmotic pressure do?
draws interstitial fluid back into venouse end of capillary
what is blood pressure?
pressure exerted by blood against blood vessel walls
Where is blood pressure the highest?
aorta and it decreases as it travels further from the heart
What is systolic blood pressure?
ventricular contraction
What is diastolic blood pressure?
ventricular relaxation, no blood ejected
