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The Circulatory System. FUNCTION: Delivery system that moves oxygen and nutrients to the body's cells , and carries away carbon dioxide and waste materials. www.biosbcc.net/doohan/ sample/htm/heart.htm. Parts of the Circulatory System. Divided into 3 major parts: Heart Blood

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The circulatory system

FUNCTION:Delivery system that moves oxygen and nutrients to the body's cells, and carries away carbon dioxide and waste materials.



Parts of the circulatory system
Parts of the Circulatory System

  • Divided into 3 major parts:

    • Heart

    • Blood

    • Blood Vessels



Blood vessels
Blood Vessels

Hollow tubes that circulate your blood

  • Arteries

  • Veins

  • Capillaries


The circulatory system

Arteries

  • Carry blood away from the heart

  • Have strong, muscular walls

  • The inner layer is very smooth so that the blood can flow easily

http://hes.ucf.k12.pa.us/gclaypo/circdia.html


Veins
Veins

  • Carry blood to the heart

  • Transport waste-rich/ oxygen-poor blood back to the lungs and heart

  • Valves inside the veins make blood move in one direction

http://hes.ucf.k12.pa.us/gclaypo/circdia.html


Capillaries
Capillaries

  • Only one cell thick

  • Connect arteries & veins

  • Food and oxygen released to the body cells

  • Carbon dioxide and other waste products returned to the bloodstream

http://sln.fi.edu/biosci/systems/circulation.html



The heart
The Heart

  • Size of your fist

  • Thick muscular walls

  • 4 chambers –L/R Atrium, L/R Ventricle



The circulatory system

Close up of heart valveHeart sounds are made by the valvesas they open and close

http://hes.ucf.k12.pa.us/gclaypo/circdia.html


Blood
Blood

  • Carries nutrients, water, oxygen and waste products to and from your body cells.

  • White blood cells protect the body from germs

http://hes.ucf.k12.pa.us/gclaypo/circdia.html