The circulatory system transports blood throughout the body to deliver oxygen and nutrients to cells and remove waste. It includes the heart, which pumps blood through vessels. There are three main types of blood vessels - arteries, which carry blood away from the heart; veins, which carry blood back to the heart; and capillaries, which connect arteries and veins and allow exchange of materials with body cells. The circulatory system moves blood in a double circulation from the heart to the lungs and back, and from the heart to all body tissues before returning to the heart.

1. STRUCTURE AND FUNCTION:
CIRCULATORY SYSTEM
Journey Into a Man’s
Heart

2. K W H L
What do I
know?
What do I
want to find
out?
How can I
find out
what I want
to learn?
What did I
learn?
[at the end of
the lesson]
Skills I
expect to use

3. What makes your heart
beats fast?

4. What do you know about your Heart?
How do you take care of your Heart?

5. LABORATORY ACTIVITY 1 – PULSE RATE CHECK
Standing Walking
Jogging
in Place
Pulse
Rate

6. Guide Questions
1.Do you have a normal heart rate?
2. What is the possible cause of having an
abnormal pulse rate?
3. Why is exercise beneficial to you?
4. Aside from exercise, how do you keep
your heart healthy?

7. How do the
parts of the
Circulatory
System work
together?
How do we take
care of our
circulatory
system?
How is the
organ system
designed to
perform its
function?
1 2
3

8. What do cell of an
organism need to
carry on life
processes?
What is
METABOLISM?
What do you call the
waste products of the
cells?
F _ _ D
O _ _ _ _ N
N _ _ _ _ _ _ _ S

9. Life

10. Circulatory
System
Body’s
transport
System
What is
CIRCULATION?

11. Movement of the
blood
Pumping action of
heart
Distribute nutrients
Remove waste

12. Cardiovascular
“Cardio” =
Heart
“Vascular” =
Blood Vessels

14. What is the function of
BLOOD VESSELS?
What are the
three types of
BLOOD VESSELS?

15. Capillaries
Vein
Artery

16. Which blood vessel carry blood away from the
heart?
Which blood vessel brings blood back to the
heart?
Which blood vessel carry blood from
small artery to a small vein?

19. Closed
Transport
System
Open
Transport
System

21. WHAT IS THE DIFFERENCE?
Closed
- Vertebrates and few
invertebrates
- Have heart and blood vessels
- Does not fill body cavities
- Blood kept in blood vessels
- Heart pumps blood
Open
- Invertebrates
- Do not have true heart or
capillaries
- Blood is pumped in hemocoel
[cavity]
- Blood + interstitial fluid =
hemolymph

23. Structure of Blood Vessels

24. [1] [2] [3]

26. THE HEART
The most
“hardworking”
organ

27. What are the four chambers of the heart?
What are the four valves of the heart?
What are the five large blood vessels
connected to the heart?

31. BLOOD

32. 45%
55%
Blood Composition
Blood Cells Blood Plasma

33. 45%
1%
54%
Composition of Blood Cells
Red Blood Cells
White Blood Cells + Blood Platelets
Plasma

34. 92%
7% 1%
Composition of Blood Plasma
Water Proteins Other Substances

36. RED BLOOD CELLS [ERYTHROCYTES]
[biconcave] [no nucleus]
[unable to repair]
[120 days  body]
[10 days  blood]
[Hemoglobin  red] [carry O2]

39. WHITE BLOOD CELLS [LEUKOCYTES]

40. {larger than RBC}
{lymphocytes  antibodies}
{lymph nodes} {act against foreign substances}

41. BLOOD PLATELETS
Not cells
No nuclei
Fragments
Role: Clotting of Blood

44. Are you a
humanitarian?
Are you willing
to donate blood?

45. 3-2-1
3 Things That You Remember
2 Things That You Don’t Understand
1 Thing That You Want to Share