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CIRCULATORY SYSTEM
Circulatory System:
• Organs and tissues that transport essential materials to
body cells and remove waste products
• Blood is moved through body by heart pumping
– Picks up nutrients/drops off waste
• Blood travels in 3 Vessles:
– Arteries
• Moves blood AWAY from heart
– Veins
• Takes blood TO heart
– Capillaries
• Tiny tubes that carry blood from the arteries to the body’s cells and
then back to the veins
ONCE AGAIN:
1. ARTERIES CARRY BLOOD: ???
2. VEINS CARRY BLOOD:???
3. CAPILLERIES ARE: ????
We have over 80,000 miles of blood
vessels
throughout our body!!!!!!
2 Pathways
of the Circulatory
1. Pulmonary Circulation
System
:
-Flow of blood FROM heart TO lungs and back to
heart
Lungs
-pulmonary arteries carry blood with CO2 away from heart
-pulmonary veins carry O2 blood to heart
2. Systemic Circulation
- Flow of blood to ALL other body tissue
(except lungs)
4 Chambers of Heart
Upper Chambers: Atriums
Lower Chambers: Ventricles
BLOOD
- Mixture of solids within a liquid-Plasma
- Plasma
-
92% water
Transports blood solids, nutrients, hormones, and other
materials
- White Bloods Cells
-
Helps fight disease and infection by attacking germs that
enter the body
- Red Blood Cells
-
Carry oxygen to cells and carbon dioxide away from them
- Platelets
-
Help blood form clot at site of wound
Seals a cut and prevents excessive blood loss
BLOOD
PRESSURE
-PRESSURE THAT IS EXERTED AS BLOOD MOVES
THROUGH YOUR BODY AND AGAINST WALLS OF
BLOOD VESSELS
1. Systolic Pressure
-When BP is at HIGHEST point
-As your heart contracts to push blood into
arteries
2. Diastolic Pressure
- When BP is at its LOWEST point
Blood Types
Type A, B, AB, and O
1. Type A blood has
substance A
2. B has substance B
3. AB has both substance
AB
4. Type O has Neither
(O- universal donor)
PROBLEMS
of the Circulatory System
• Hypertension (blood pressure is higher than normal= heart
attack, stoke, kidney failure)
• Stroke (blood clots block vessels in brain or rupture of blood
vessel)
• Heart Attack (blockage of blood flow to heart)
• Arteriosclerosis (arteries harden reducing amount of blood
flow allowed through)
• Anemia
• Leukemia
• Hemophilia
How to take Care of Circulatory System
• Limit fat in foods
• Get regular physical
activity
• Avoid tobacco
• Manage Stress
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