circulatory system

1. Lesson 4:
How Does the
Circulatory System
Work?

2. The Circulatory system consists of heart,
the blood and the blood vessels.
This system is also known as
cardiovascular system.
It is a transport system.
It distributes oxygen, nutrients and other
essential substances to the body cell.
- Cardio means heart and vascular
means vessel or passage through which
the blood flows.

3. Parts of the Circulatory System
and their Functions

4. The Heart
The pumping organ of our
circulatory system.
It beats without stopping.
It pumps blood throughout our
body.
A muscular organ big as our fist.
1.

5. It surrounds the heart.
The heart muscle.
Muscular wall of the heart.
Pericardium
Myocardium
Septum

6. Four Chambers of the heart
Atria - receiving chambers
Ventricles - pumping chambers
Right and Left

8. Valves - prevents blood from back
flowing.

9. tricuspid between the right atrium
and right ventricle.
bicuspid or mitral between the left
atrium and left ventricle.

10. pulmonary semilunar valve between
the right ventricle and pulmonary
artery.
aortic semilunar valve between the
left ventricle and the aorta.

11. The components of the
circulatory system that transport
blood throughout the human
body.
2. Blood Vessels

12. Arteries - carry blood away from
the heart.
Capillaries - connect the smallest
arteries to the smallest veins.
Veins - carry blood towards the
heart.
Kinds of Blood Vessels

14. consist of a liquid called plasma
and cellular components such as
red blood cells, white blood cells
and platelets.
3. Blood

15. clear yellow liquid which is about
92% water.
also called erythrocytes,
produced in bone marrow.
contain iron-rich hemoglobin
which gives blood its red color.
Plasma
Red Blood cells

16. also called leucocytes, produced
in bone marrow.
bigger but fewer in number.
also known as "soldiers of the
body because they destroy
disease-causing germs that
enters the body.
White Blood cells

17. also called thrombocytes.
small, colorless and irregular in
shape.
Blood platelets

19. a bigger, wider circulation that
involves the whole body system,
from the heart to all body parts and
back.
Paths of Blood Circulation:
Systemic circulation

20. a smaller, limited circulation that
involves only the lungs, from the
heart to the lungs and back.
Paths of Blood Circulation:
Pulmonary circulation

22. Common Ailments of the
Circulatory System

23. Anemia
- disorder of the blood that results from
the deficiency of red blood cells.
Leukemia
- cancer of the blood due to
overproduction of abnormal white blood
cells.

24. Hypertension
- or high blood pressure. It can lead to
severe health complications and increase
the risk of heart disease, stroke, and
sometimes death.

25. Arteriosclerosis
- thickening of the inner layer of the
artery that narrows its passage, thus
weakening blood flow.
Coronary Heart Disease
- cause by narrowing of arteries that
supply blood to the heart muscles.

26. Rheumatic Heart Disease
- affects all tissues of the heart. A condition in
which the heart valves have been permanently
damaged by rheumatic fever.
Congenital Heart Disease
- any disorder in the structure of the heart or
its blood vessels that impedes blood flow when
the baby is born.

27. Proper Care of the Circulatory
System

28. Have a balanced diet.
Have adequate, regular exercise.
Avoid emotional and unnecessary
worries.
Always consult a doctor when taking
medicines.