The Beat Goes On

1
The Beat Goes On!

• Sit back and take a tour of the circulatory
  system.

Click on the image to view the Web site.
2
The Four Chambers of the Heart

• Blood flows from the right atrium through a
  one-way valve into the right ventricle.
• The right ventricle contracts, forcing blood out
  of the heart into a large artery.

• Right Atrium

• Right Ventricle

Click on the image to view the Web site.
3
The Beat Continues

• This artery forks, taking blood to the lungs
  where the arteries branch into smaller and
  smaller arteries. These lead to capillaries that
  are next to tiny air sacs in the lungs.
• The capillaries lead to veins that take the blood
  back to the heart.

Click on the image to view the Web site.
4
The blood flows first into the left atrium and
then through a one-way valve into the left
ventricle.
Click on the image to view the Web site.

• Aorta

• The Beat Goes On!

• The left ventricle contracts and forces blood
  into the aorta.

• Left Atrium

• Left Ventricle

5
From the aorta, branching arteries lead into
capillaries. Here blood gives up oxygen to cells
and takes on carbon dioxide and other wastes.

• The blood then returns via veins to the right
  atrium of the heart, completing the cycle.

• The Beat Goes On!

• Click on the image to view the Web site.

6
References

• Heart Rhythm Society. (2005). Structure The Four
  Chambers of the Heart. Retrieved on March 25,
  2005 from http//www.hrspatients.org/patients/the_
  normal_heart/structure.asp
• Patient Marketing Group, Inc. (2004). Retrieved
  on March 25, 2005 from http//www.healthopedia.com
  /pictures/electrocardiogram-showing-atrial-flutter
  -rapid-heart-beat.html
• Pearson Education, Inc. (2005). Retrieved on
  March 25, 2005 from
• http//www.phschool.com/science/biology_place/bioc
  oach/cardio1/intro.html
• McGann, Andrew. (2005). A look inside the human
  body. Retrieved on March 25, 2005 from
  http//www4.tpgi.com.au/users/amcgann/body/circula
  tory.html