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33.1 Overview. Blood circulates through our entire body - Internal transportation Blood is pumped by heart and carries…. Oxygen Nutrients Hormones Waste Products To the cells in our body……. Components of Circulatory System Blood Heart Blood Vessels

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33 1 overview
33.1 Overview

  • Blood circulates through our entire body - Internal transportation

  • Blood is pumped by heart and carries….

    • Oxygen

    • Nutrients

    • Hormones

    • Waste Products

      To the cells in our body……

Components of

Circulatory System

Blood

Heart

Blood Vessels

What are the 3 main types of blood vessels?


Human heart
Human HEART

Your heart is composed almost entirely of ______.

Powerful contractions of the myocardium (heart

muscle) pump blood through the circulatory system.


Structure of the heart
Structure of the HEART

2 Sided Pump

Right: body  heart  lungs

Left: lungs  heart  to body

Upper Chambers

Atria (R/L Atrium)

Receive blood

Lower Chambers

Ventricles (R/L Ventricle)

Pump blood out of heart


The chambers the valves
The Chambers & The Valves

or Bicuspid Valve


Pathways of circulation
Pathways of Circulation

PULMONARY

SYSTEMIC

  • Carries blood between HEART & ____________

  • O2 poor blood

    • Pulmonary Arteries to lungs

    • Returns oxygenated through Pulmonary Veins to heart

  • Carries blood from L.V. to the R.A. (TO BODY CELLS)

  • O2 rich blood leaving the heart

    • Supplies every organ with blood, including heart


Blood vessels
Blood Vessels!

  • Blood: heart → body

  • Tough and flexible

  • O2 RICH blood except…

  • Largest Artery?

Capillaries– thin vessels, O2 and nutrients diffuse into tissues; single file

Blood: body → heart

Thinner and less elastic

O2 Poor

Large veins contain valves

Muscles contract to move blood


What is blood pressure
What is Blood Pressure?

  • Define: “[the] pressure that is exerted by the blood upon the walls of the blood vessels”

  • Blood Pressure is measured by the Systolic Pressure over the Diastolic Pressure.

    • For example, the average healthy teen or adult has a blood pressure below 120/80 and above 100/65

  • Systolic Pressure is the fluid pressure of a contracted blood vessel.

  • Diastolic Pressure is the fluid pressure of a relaxed blood vessel.


High blood pressure 140 90 and above
HIGHBLOOD PRESSURE140/90 and above

  • HighBlood Pressure, orHypertension, is a problem that many people suffer from and do not even know, because it often has no symptoms

  • HighBlood Pressure can cause:

    • Heart damage due to the need for the heart to work harder

    • Tears in blood vessels

    • Heart attack

    • Stroke

    • Kidney Damage


Low blood pressure 90 60 and below
LOWBLOOD PRESSURE90/60 and Below

  • LowBlood Pressure, orHypotension can cause:

    • Kidney Failure

    • Dehydration

    • Dizziness

    • Syncope (fainting)