🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
HomeClass Notes1,200,000CA670,000

Physiology 1021 Lecture Notes - Pulmonary Artery, Arteriole, Venae Cavae

20 views18 pages
carminecod4
29 Jan 2012
School
Western University
Department
Physiology
Course
Physiology 1021
Professor
John Ciriello

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Module 9 - circulatory system 2: blood vessels. Introduction: y the circulatory system is divided into 2 distinct loops: the pulmonary circulation, systematic circulation. Anatomy - general organization: y the c system is essentially a closed system of tubes (blood vessels) filled with fluid (blood) that is moved around by a central pump (the heart) Blood vessels: consist of arteries and arterioles that transport the blood away from the heart. Blood volume distribution: y the total blood volume (tbv) of an average human being is roughly 5l (1. 3 gallons) y the largest portion (70%) is contained in the veins y. Blood flow through a vessel is called laminar (streamlined) flow: there are thin layers of flow whose velocity varies across the vessel - flow is slower at the edges and faster in the center. Flow = (p1 - p2)/resistance(r) (p1 - p2) - is the pressure gradient - simply the pressure change between two points.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Physiology 1021 Chapter Notes - Chapter 9: Solution, Elastic Fiber, Vasomotor
champagnehornet778
Physiology 1021 Lecture Notes - Lecture 9: Pulmonary Vein, Pulmonary Artery, Pulmonary Circulation
burgundysheep554
Physiology 1021 Lecture Notes - Lecture 28: Stroke Volume, Resting Potential, Membrane Potential
ceriseraccoon733

Related Questions

In humans,blood flows from the heart to the aorta, from which itpasses into the major arteries. These branch into the smallarteries, which in turn branch into billions of tiny capillaries.Then blood then returns to the heart via the veins. The radius ofthe aorta is about 1.2cm, and the blood passes through it with aspeed of about 40cm/s. A typical capillary has a radius of about4x10-4 cm, and the blood flows through it at a speed of 5x10-2cm/s.

(a) Estimate the number of capillaries in the body.

(b) If the body contains about 5.5 litres of blood how long does ittake for the blood to circulate completely through the body. (1litre = 10cmx10cmx10cm)

In humans, blood flows from the heart into the aorta, from whichitpasses into the major arteries. These branch into thesmallarteries (arterioles), which in turn branch into myriads oftinycapillaries, see the figure. The blood returns to the heart viatheveins. The radius of the aorta is 1.0 cm and the bloodpassingthrough it has a speed of about 32 cm/s. Atypical capillaryhas a radius of about 4 × 10-4cm, and blood flowsthrough it at a speed of about 5 ×10-4 m/s. Calculatethe average speed of blood flow inthe major arteries of the bodywhich have a total cross-sectionalarea of about 2.1 cm2.

Inside diamter of aorta is 1.6 cm and inside diameter ofcapillary is 1.0 x 10 -6 m Average flow speed is 1.0 m/sin aorta and 1.0 cm/s in capillary. If all the blood in aortaeventually flows through a capillary, estimate number ofcapillaries in circulatory system.