YOUR CIRCULATORY SYSTEM How does it work? Why does a doctor check your pulse and blood pressure?...
-
Upload
dominik-say -
Category
Documents
-
view
214 -
download
0
Transcript of YOUR CIRCULATORY SYSTEM How does it work? Why does a doctor check your pulse and blood pressure?...
YOUR CIRCULATORY SYSTEM
How does it work?
Why does a doctor check your pulse and blood pressure?
What is your blood type and why is it important?
The Transport System
• CIRCULATORY SYSTEM– Your body’s transport system.– Keeps the body working well.
• By delivering essential materials to body cells and removing waste materials from the cells.
» THIS BODY SYSTEM IS ALSO KNOWN AS THE CARDIOVASCULAR SYSTEM.
How the Circulatory System works
• Blood carries substances through Circulatory System
• Organs serve as transfer stations– Blood picks up
nutrients and delivers them to cells
• Wastes and removes them from body
HEART
• Is a pump, that moves blood in 2 major pathways
1. Pulmonary Circulation
2. Systematic Circulation
HEART
• The heart is divided into 4 chambers– Each upper chamber is
called ATRIUM– Each lower chamber is
called VENTRICLE
* VALVES open and close to control the flow of blood
Blood
• A mixture of solids in a large amount of liquid called plasma
• PLASMA– Is about 92% water
– The solids are• Red blood cells
• White blood cells
• Platelets
Parts of Blood
• Red blood cells – carry oxygen to the cells and carbon dioxide away from the cells.
• White blood cells – help fight disease and infection by attacking germs that enter the body
• Platelets – help blood clot, which seals cuts and prevents excess blood loss from a wound
More about Blood
• Blood is essential to life
• Your blood is not the same as everyone else’s
• Blood transfusions– Blood must match– Mixing blood could have serious side effects
• High fevers, difficulty breathing, and even death
Positive or Negative Blood
• Rh +
– Blood does contain Rh factor
• Rh –
– Blood does not contain Rh factor
Blood Banks
• People of age can donate blood
• Only people in good health can donate
• A new needle is used every time blood is drawn
• All donated blood is tested for disease
Blood Vessels
• Over 80,000 miles of blood vessels move your blood throughout your body
• Three types of blood vessels
1. Arteries
2. Veins
3. Capillaries
Capillaries
Tiny tubes that carry blood from the arteries to the body’s cells and from
cells to the veins
Blood Pressure
• As blood moves through your body, it exerts pressure against the walls of blood vessels
• Sphygmomanometer – instrument that measures blood pressure
Cardiovascular Disorders
• Stroke• Heart attack• Arteriosclerosis• Hypertension
– High blood pressure
• Anemia• Sickle-cell anemia• Mononucleosis• Leukemia• Hemophilla