Mr. Alexander, Miss Jacobs, and Miss Socash
The Circulatory system Blood vessels Arteries Veins
Arteries are the blood vessels that carry oxygenated blood AWAY from the heart The veins bring the blood without oxygen BACK to the heart
Four chambers Upper chambers= atria Lower chambers= ventricles One way valves control the flow of blood through the heart
This will show the flow of blood through the heart circulatorysystem.cfm circulatorysystem.cfm
Components: Blood cells red white Blood plasma Platelets
Blood comes in four main types : O, A, B and AB.Type O blood is a UNIVERSAL DONOR. Type AB blood is a UNIVERSAL RECEIVER.
Percentage distribution of blood types in the general population ABABO 37%12%3%47%
Used to categorize blood Rhesus positive (+) Rhesus negative (-) If the Rh antigen is present the blood is positive
Blood TransfusionsDonating blood to the Red CrossSAFETY, SAFETY, SAFETY!!!
Donors must provide a thorough history Recent travel Infections Medicines Health problems Blood donations are tested for: HIV Hepatitis B and C Syphilis West Nile virus If any of these are found, the blood is destroyed.
What is a pulse? Throbbing of the arteries caused by contractions of the heart Let’s check your pulse!
When a doctor takes your pulse he/she is mainly checking for two things: How fast your pulse is If your pulse is regular(same time between beats)
What is blood pressure? Pressure of the blood against the walls of the arteries Results from two forces: Heart pumping blood into the arteries Arteries resisting blood flow
The systolic number represents the pressure while the heart contracts. The diastolic number represents the pressure when the heart relaxes. Systolic/Diastolic 118/70
Hypertension (140/90) High blood pressure can cause: Heart attack Stroke Risk factors: Diet High stress levels Exercise Tobacco use
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