1. The Circulatory System

2. Transportation system by which
oxygen and nutrients reach the
body's cells, and waste materials
are carried away.

3. Also carries substances called
hormones, which control body
processes, and antibodies to
fight invading germs.

4. www.biosbcc.net/doohan/ sample/htm/heart.htm

5. Parts of the Circulatory System
• Divided into three major parts:
– The Heart
– The Blood
– The Blood Vessels

6. The heart, the lungs, and the
blood vessels work together to
form the circle part of the
circulatory system.

7. Circulation
• Two parts
• Heart acts as double pump
• Blood from the right side pump is dark red
and low in oxygen (oxygen-poor)

8. Circulation
• Travels through pulmonary arteries to
lungs where it gets fresh oxygen and
becomes bright red
• Blood from lungs through pulmonary veins
back to the heart's left side pump
• Pumped out into the body

9. http://users.tpg.com.au/users/amcgann/body/circulatory.html

10. 3 Kinds of Circulation:
• Pulmonary circulation
• Coronary circulation
• Systemic circulation

11. Pulmonary Circulation
Movement of blood from the heart, to the
lungs, and back to the heart again

12. sln.fi.edu/biosci/systems/ pulmonary.html

13. Coronary Circulation
Movement of blood through the tissues of
the heart

14. http://sln.fi.edu/biosci2/systems/

15. Systemic Circulation
Supplies nourishment to all of the tissue
located throughout the body , except for
the heart and lungs

16. http://sln.fi.edu/biosci/systems/systemic.html

17. Blood Vessels
Hollow tubes that circulate your blood

18. Three Kinds of Blood Vessels
• Arteries
• Veins
• Capillaries

19. Arteries
• Carry blood AWAY from the heart
• Heart pumps blood
• Main artery called the aorta
• Aorta divides and branches
• Many smaller arteries
• Each region of your body has system of
arteries supplying it with fresh, oxygen-rich
blood.

20. Arteries
• Tough on the outside
• Smooth on the inside
• Muscular wall helps the heart pump blood

21. http://hes.ucf.k12.pa.us/gclaypo/circdia.html
Have strong, muscular walls
The inner layer is very smooth so that the blood
can flow easily

22. http://sln.fi.edu/biosci/systems/circulation.html

23. Capillaries
• Very thin
• Only one cell thick
• Connect arteries & veins

24. Capillaries
• Food and oxygen released to the body
cells
• Carbon dioxide and other waste products
returned to the bloodstream

25. http://sln.fi.edu/biosci/systems/circulation.html

26. w3.uokhsc.edu

28. http://hes.ucf.k12.pa.us/gclaypo/circdia.html
Valves are located inside the veins. The valves
only allow blood to move in one direction.

29. http://users.tpg.com.au/users/amcgann/body/circulatory.html

30. Veins
• Carry blood to the heart
• Receive blood from the capillaries
• Transport waste-rich/ oxygen-poor blood
back to the lungs and heart
• Valves are located inside the veins
• Allow blood to move in one direction

31. http://sln.fi.edu/biosci/systems/circulation.html

32. The Heart
• Size of your fist
• Thick muscular walls
• Divided into two pumps
• Each pump has two chambers
• Upper chamber - atrium receives blood
coming in from the veins
• Lower chamber - ventricle squeezes blood
out into the arteries

33. http://hes.ucf.k12.pa.us/gclaypo/circdia.html

34. Close up of heart valve
Heart sounds are made by the valves
as they open and close
http://hes.ucf.k12.pa.us/gclaypo/circdia.html

35. Blood
• Pumped by your heart.
• Travels through thousands of miles of
blood vessels
• Carries nutrients, water, oxygen and
waste products to and from your body
cells.
• Made up of liquids, solids and small
amounts of oxygen and carbon dioxide.

36. Blood
• Red blood cells carry oxygen from the
lungs to all the cells of the body.
• Takes carbon dioxide and transports it
back to the lungs
• About 5,000,000 Red Blood Cells in ONE
drop of blood.

37. http://hes.ucf.k12.pa.us/gclaypo/circdia.html

38. Blood
• White blood cells protect the body from
germs
• Attack and destroy germs when they enter
the body

39. scienceu.fsu.edu
www.merck.com/pubs/mmanual_home/
illus/167i2.htm

40. Blood
• Platelets are blood cells that help stop
bleeding

41. user.gru.net/clawrence/ vccl/chpt7/plate.htm

42. Blood
• Plasma is the liquid part of the blood
• About half of your blood is made of
plasma
• The plasma carries the blood cells
throughout the body
• Plasma is made in the liver.