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Vascular Transport 2: Closed Circulatory Systems study guide that includes all the notes and relevant pictures from lecture as well as additional notes from the assigned readings

Course Code
BIOL 2601A/B
Brent Sinclair

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Organismal Phys Lecture 12:
Vascular Transport 2 Closed Circulatory Systems
The Systemic Circuit
Blood is delivering O₂ and nutrients and is picking up the waste products to deliver them to the
kidneys (or lungs if it is CO₂)
Involves the organs and muscles
When linear flow rate is reduced, is due to the cross-sectional area increasing
(↑ in radius = ↓flow rate)
Major Arteries
Muscular, elastic thick walls (smooth muscle and elastin)
Pressure of 10-20 kPa
Very elastic, which it needs to be so can stretch when receives blood from the heart; therefore
allows storage of some elastic energy (in artery wall), and dampens the pressure differences
Ex: Aorta, carotid artery, femoral artery
Terminal Arteries
(12/8 kPa)
Relatively high pressure as enter heart, but drops as radius ↑’s
Arteries become smaller as they branch out towards the periphery of the circulatory system;
walls of the arteries also become thinner (tension ↓’s too)
Microcirculatory Beds
The systemic arteries ultimately deliver blood to networks of microscopically tiny blood vessels
in all the systemic organs & tissues
Consists of 3 types of vessels
o 1. Arterioles
o 2. Capillaries
o 3. Venules
Right ventricle then increases
pressure to 1.9kPa for passage
through lungs
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