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The Circulatory System

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Lane France

on 3 February 2014

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Transcript of The Circulatory System

The Circulatory System
The Heart

Blood Types and Rh Factors
Your blood type is defined by surface proteins on red blood cells.
Blood Vessels
Three main vessels
Composed mainly of cells, cell fragments and plasma.

Plasma is very important, it determines which substances will diffuse into and out of the blood that moves throught the capillaries.
Two Main Pathways
Pulmonary circulation occurs only between the heart and lungs.

Systemic circulation occurs between the heart and the rest of the body.
Arteries carry blood AWAY from the heart

Veins carry blood back to your heart

Capillaries connect arteries to veins
The circulatory system is an organ system that permits blood and lymph circulation to transport nutrients (such as amino acids and electrolytes) oxygen, carbon dioxide, hormones, blood cells, to fight diseases, maintain homeostasis, and stabilize body temperature and ph levels.
The heart is made of two small chambers called the atrium and two larger chambers called the ventricles.
The ventricles are separated by the septum, a thick wall of tissue.
The heart valves are flaps of tissue that prevent blood from flowing backward.
Red Blood Cells,
White Blood Cells
Red Blood Cells are responsible for the transportation of gases, most importantly to carry O2 to the cells and carry CO2 away from them
The job of white blood cells is to defend the body against infection. They also remove foreign material and dead cells.
Blood Clots and Platelets
Platelets are cell fragments that form clots to control bleeding. The clot repairs the wound, and thus prevents any furthur loss of blood.
Clots help us heal when our blood vessels get a cut or tear in them. They can be dangerous if clots are formed inside the blood vessel however.
Blood Pressure
This is the force with which blood pushes against the wall of an artery(a healthy resting blood pressure for a young adult is around 120/70)

{120 is the systolic pressure and 70 is the diastolic pressure}
The most common markers are A & B. Which produce A, B, AB, and O. (ABO blood group)
Systolic pressure is the amount of pressure on the walls of an artery when the left ventricle contracts to pump blood through the body.
Diastolic pressure is the pressure in the artery when the left ventricle relaxes.
Full transcript