The circulatory system is responsible for transporting substances like oxygen, nutrients, hormones around the body, and removing carbon dioxide and wastes to be eliminated. It has three main components: blood, blood vessels, and the heart. Blood carries oxygen from the lungs to tissues, nutrients from the intestines to cells, and waste products to the kidneys. It also regulates temperature, transports hormones, and protects the body from pathogens. The heart has four chambers and valves that pump blood through two circuits - pulmonary circulation to the lungs and systemic circulation to the rest of the body. An aneurysm is a bulge or weakening in an artery wall often caused by high blood pressure or other factors.

1. CIRCULATORY
SYSTEM
General Biology 11

2. GENERAL FUNCTIONS
•Responsible in carrying/transporting different
substances (oxygen, food materials, hormones)
•Responsible in removing carbon dioxide and other
wastes from tissues bringing them to the organs
where they are to be eliminated

3. FLUID COMPARTMENTS

4. Components of the Circulatory System

5. BLOOD

7. FUNCTIONS:
Transports oxygen from lungs to tissues and
carbon dioxide from tissues to lungs
Carries food materials from small intestines to
different parts of the body
Brings waste materials to kidneys for excretion
Distribute heat to nucleus, thus helping in
regulation of body temperature

8. Transports secretions (hormones) from glands
to tissues
Involved in salt and water balance
Protects the body form foreign substances
through phagocytic action of lymphocytes

27. BLOOD VESSELS

33. Great Saphenous Vein
 the major superficial vein of
the medial leg and thigh
 It is the longest vein in the
human body, extending from
the top of the foot to the
upper thigh and groin.

38. THE HEART

39. CHAMBERS OF THE HEART

40. VALVES of the HEART

58. BLOOD CIRCULATION
Occurs simultaneously
Pulmonary and Systemic
Circulation

60. PULMONARY CIRCULATION
Passage

69. What is Aneurysm?
- Caused by high blood pressure,
atherosclerosis, trauma, heredity and
abnormal blood flow at the junction
where arteries come together