Mr. Alexander, Miss Jacobs, and Miss Socash. The Circulatory system Blood vessels Arteries Veins

Mr. Alexander, Miss Jacobs, and Miss Socash

The Circulatory system Blood vessels

Arteries Veins

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

http://www.texasheartinstitute.org/HIC/ProjH/circulatorysystem.cfm

Components: Blood cells

red white

Blood plasma Platelets

Percentage distribution of blood types in the general population

A B AB O

37% 12% 3% 47%

Used to categorize blood Rhesus positive (+) Rhesus negative (-)

If the Rh antigen is present the blood is positive

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

http://www.studystack.com/studytable-20168

http://www.texasheartinstitute.org/hic/anatomy/anatomy2.cfm

http://en.wikipedia.org/wiki/Blood