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 System:1. Pulmonary Circulation
-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)
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
BLOODPRESSURE
-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 TypesType A, B, AB, and
O1. Type A blood has
substance A2. B has substance B3. AB has both
substance AB4. 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