1. Circulatory System

2. - Made up of the heart and a network of blood vessels
3 kinds of blood vessels
1. Arteries
2. Capillaries
3. Veins

3. IT'S TRUE!
The heart beats around 3 billion times in the average person’s life

4. - Have thick, elastic walls - smallest arteries called arterioles
Arteries- carry blood away from the heart toward the organs and tissues of the body
- Have thick, elastic walls
- smallest arteries called arterioles
* Ends in “oles”, gets smaller
by branching off

5. IT'S TRUE!
About 8 million cells die in the human body every second, and the same number are born each second.

6. Capillaries- connect arterioles and venules
- thin walls allow the exchange of nutrients, waste, oxygen between the blood and body cells

8. IT'S TRUE!
Within a tiny droplet of blood, there are some 5 million red blood cells

9. Veins- return blood to heart from organs and body tissues
- smallest veins called venules
- thin walls, not as elastic
- contain valves to prevent backflow

12. The Heart - acts as a double pump -made up of cardiac muscle
Has 4 chambers:
2 atria- upper, thin walled chambers
2 ventricles- lower, thick walled chambers
valves in heart control direction of blood flow

13. IT'S TRUE!
Red blood cells may live for about 4 months circulating throughout the body, feeding the 60 trillion other body cells.

14. Heartbeat- made up of two periods
Systole- period of contraction
- valves closed
Diastole- period of relaxation
- valves open
“lub-dup” sound is opening and closing of the valves
S-A node(sinoatrial node)- pacemaker
- sends electrical impulse which triggers contraction of the heart

15. Blood Pressure- measured by sphygmomanometer
Systolic = in normal Diastolic resting adult

16. Pathways of Human Circulation

17. Pulmonary Circulation- carries blood between the heart and lungs
- adds oxygen and removes
CO2 from the blood

18. Pulmonary Artery- takes blood to lungs

19. IT'S TRUE!
Red blood cells make approximately 250,000 round trips of the body before returning to the bone marrow, where they were born, to die.

20. Aorta- takes blood to all other body tissues - largest artery of the body

21. Systemic Circulation- carries blood between the heart and the rest of the body

22. Consists of 3 branches:
1. Coronary Circulation- branch of the systemic circulation that supplies blood to the heart

23. 2. Hepatic-Portal Circulation- branch of the systemic circulation that carries blood from the digestive tract to the liver

24. 3. Renal Circulation- branch of the systemic circulation that carries blood to and from the kidneys

25. IT'S TRUE!
It takes about 20 seconds for a red blood cell to circle the whole body.

27. Circulation of the Lymph

28. - all cells of the body are bathed in this colorless, watery fluid
Intercellular Fluid- helps move materials between the capillaries and the body cells
- all cells of the body are bathed in this colorless, watery fluid

29. Lymphatic System- collects excess fluid and proteins from intercellular spaces in the body and returns them to the blood

30. - they filter foreign matter from the lymph such as bacteria
Lymph- what intercellular fluid is called once inside the lymphatic system
Lymph Nodes- (lymph glands) - play important role in the body’s defense against disease
- they filter foreign matter from the lymph such as bacteria

31. NODES IN YOUR NECK

32. Circulatory Disorders
PROBLEM
DESCRIPTION
Heart Attack
Coronary Thrombosis
Angina Pectoris
Hypertension
Atherosclerosis

33. Hypertension- high blood pressure