1. The Transportation System of the Body
Circulatory System
The Transportation System of the Body

2. FUNCTION Transportation system
Blood delivers nutrients and O2 to cells
Blood removes waste materials = CO2
Composed of HEART, BLOOD, BLOOD VESSELS

3. HEART PUMP= Driving Force Made of Cardiac Muscle Own Blood Supply
Four Chambers:
2 ATRIA [top]
2 VENTRICLES [bottom]

4. HEART Heart BEAT-Lub Dup VALVES BLOOD moves by the chambers undergoing
CONTRACTION/RELAXATION
CONTRACT=Systole
RELAX=Diastole
SOUND is from the BOTH ATRIA contracting/relaxing at the same time THEN BOTH VENTRICLES contracting/relaxing at same time
SEPARATE Atria and Ventricles
ONE WAY FLOW- prevent backflow
RIGHT SIDE- TRICUSPID
LEFT SIDE- BICUSPID/MITRAL
SEMI-LUNAR = in major vessels leaving heart
[Aortic & Pulmonary]

5. BLOOD PATHWAY Ox DeOx FROM Working Cells…..used O2
Superior /Inferior Vena Cava
Right Atrium
TRICUSPID VALVE
Right Ventricle
PULMONARY VALVE
Pulmonary Arteries ****
Lungs to get O2
Pulmonary Veins ****
Left Atrium
BICUSPID/MITRAL VALVE
AORTIC VALVE
Aorta
TO Body Tissues & Organs…..

6. BLOOD- 5 LITERS Plasma = liquid in which cells are suspended
Is a FLUID TISSUE Composed of:
-LIQUID [55%- Plasma]
-CELL PARTS [45% RBC, WBC, Platelets]
-DISSOLVED SUBSTANCES
[hormones, nutrients, waste, etc]
Plasma = liquid in which cells are suspended
Cells = connective tissue from bone marrow
Red [RBC]
White [WBC]
Platelets

7. Biconcave shape No nucleus Hemoglobin component Transport Gases
RBCs/ Erythrocytes
Biconcave shape
No nucleus
Hemoglobin component
Transport Gases
FUN FACTS:
250 Mil RBCs in a single blood drop
Life span 3-4 months
Dead RBCs filtered out by Liver/Spleen

8. WBC/Leukocytes Immune system cells Destroy pathogens
Colorless, HAS a NUCLEUS
NO HEMOGLOBIN
Types of WBCs
Neutrophils
Monocytes
Basophils
Lymphocytes-
Eosinophils-
FUN FACTS:
Life span 2-3 days
Bigger than RBCs
500 K in drop of blood
Phagocytes
Make Antibodies
Specific to parasites, allergens, etc.

9. Platelets/ Thrombocytes
Fragments of cytoplasm
Control clotting
-produce Fibrin which forms netting to “catch escaping RBCs”
Clump at site to make barricade

10. BLOOD VESSELS TUBES in which blood flows to various parts of the body.
3 MAIN TYPES of BLOOD VESSELS
ARTERIES
~ Arterioles
VEINS
~ Venules
CAPILLARIES

11. Arteries/Arterioles Carry blood AWAY from the Heart
Carry OXYGENATED BLOOD
** EXCEPTION: PULMONARY ARTERIES
THICK/MUSCULAR WALLS handle Blood Pressure from the Heart
Arteries  Arterioles  Capillaries [smaller] [smallest]
AORTA is the LARGEST ARTERY
FEMORAL ARTERY in leg

12. VEINS/ VENULES Carry Blood TO the Heart Carry DEOXYGENATED BLOOD
***EXCEPTION: PULMONARY VEINS
Contain VALVES to prevent backflow
Veins  Venules Capillaries
[smaller] [smallest]
VENA CAVA is LARGEST VEIN
When veins become varicose, the leaflets of the valves no longer meet properly, and the valves don't work.

13. CAPILLARIES SMALLEST of blood vessels ONE CELL THICK
FOOD/NUTRIENTS to diffuse from blood to cells
WASTE products exchanged through
diffusion
Red blood cells within a capillary, a tiny blood vessel that directly feeds oxygen and nutrients to muscle and other tissues of the body.

14. Blood Vessel Flow
Arteries
Arterioles
Capillaries
Venules
Veins
Heart