Transcript Document

The Circulatory System
The Heart’s main structures
Atria-upper chambers of
heart
Ventricles-lower chamber of
heart
Septum-wall separating left
and right side of heart
Aorta-the heart’s main artery
Pulmonary artery-connects
heart to lungs
The Circulatory System
The right side of the
heart pumps blood
through the lungs.
 The left side of the
heart pumps blood
through the rest of
the body.
 Turn to PG 77 in Book
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The Circulatory System
Blood consists of 5 main parts
 Plasma-makes up 55% of blood
 Red Blood Cells-the part of blood
that carries oxygen
 White Blood Cells-attack invaders
at site of infection, there are 5
varieties
 Hemoglobin-moves oxygen about
when it is needed, it is the red
molecule in blood-protein in RBC
 Platelets-release substances to help
our blood clot
The Circulatory System
Blood Vessels
Arteries-carry blood from
the heart to organs and
cells in the body
Arterioles-small arteries
Capillaries-very small blood
vessels that connect
arterioles and venuls
Veins-carry blood back to
the heart
Venuls-small veins
The Circulatory System
Coronary Arteries-provide blood and oxygen
to all parts of the heart. There are two
primary coronary arteries.
Cardiac Conduction Systemthe electrical system that
enables the rhythmic
contractions of the heart.
Cardiac Conduction

Used in a graph called PQRST also known
as an ECG (electrical cardiac Graph)
PQRST
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http://www.youtube.com/watch?v=v3bYhZmQu8
The Circulatory System
Blood Pressure-surge of blood filling the
vessels creates pressure against the vessel
walls. It is measured by two #s
 Systolic-top number which is the ventricle
contraction. 120/
 Diastolic-bottom number which is the
ventricle relaxation. /80
Normal BP 120/80
The Circulatory System
Pulse is the rhythmical beating of the
heart, it is the expansion and contraction
of an artery as blood flows through it.
 An athlete will have a slower pulse
because the heart does not have to work
as hard due to it being stronger than a
non athlete.
 Normal pulse in adults is 60-80 resting
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The Circulatory System
Arterial Bleeding-bleeding from
punctured or severed artery, it is
bright red and spurts according to
hearts rhythm.
 Venous Bleeding-bleeding from
rupture of a vein, it is bluish-red and
a steady flow.
 Capillary Bleeding-bleeding from
scratches, minor cut. Its oozes and
is slow. This is what we typically
see.
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Shock
Hemorrhagic Shock
 Respiratory Shock
 Neurogenic Shock
 Cardiogenic Shock
 Metabolic Shock
 Anaphylactic Shock
 Septic Shock
 Psychogenic Shock
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