Download circulatory system notes

The
Circulatory
System
Job of the Circulatory System
•  Moves blood throughout the body to
supply nutrients
•  Transports O2 and CO2 to/from the
tissues in the body
•  Another name for circulatory system is
Cardiovascular System
Parts of the Circulatory
System
•  Heart: pumping station
•  Blood: carries Oxygen/Carbon Dioxide
•  Blood Vessels
–  Arteries
–  Veins
–  Capillaries
The Heart
•  4 chambers
–  Top parts: atria (atrium)
–  Bottom parts: ventricles
•  At rest, your heart pumps
5 quarts of blood/minute
•  When exerted, it can pump
up to 40 quarts of blood
per minute
Blood
•  Plasma: yellow liquid
–  90% water
–  10% solids (antibodies, hormones, vitamins,
enzymes, salt etc.)
•  Cellular Material
–  Red Blood Cells: carry oxygen to tissue
–  White Blood Cell: fight disease
–  Platelets: clot blood to prevent blood loss
Fun Facts About Blood
•  Red Blood Cells only last 120 days
•  We produce 5 billion RBC’s per day
•  Blood cells are made in the bone
marrow
•  Hemophilia - condition resulting in the
inability to clot properly
•  Leukemia is cancer of the blood
Why the Positive and
Negative?
•  85% of Americans are Positive
•  Rhesus Protein
–  If it is there it is +
–  Not there then it is –
•  The RH factor was discovered by
working with Rhesus Monkeys because
their blood is so similar to human’s
Blood Vessels & Transport
•  Veins – Carry Blood into the Heart
•  Arteries – Away from the Heart
•  Capillaries – Carries blood to and
away from smaller areas of the
body
– Wall is only 1 cell thick
Blood Flow through Heart
• 
• 
• 
Blood from the body travels into
the right atrium, moves into the
right ventricle, and is finally
pushed into lungs in the
pulmonary arteries
The blood then picks up oxygen
and travels back to the heart into
the left atrium through the
pulmonary veins
The blood then travels through the
valve to the Left Ventricle and
exits to the body through the
Aorta…
Right Atrium
Left Atrium
Blood Flow to Body
•  Oxygen rich blood leaves
the heart and travels
through arteries
•  In the capillaries the
oxygen and food is given
to the body’s cells
•  The blood finally travels
back through veins to the
heart to pick up oxygen
ARTERIES- FROM HEART
CAPILLARIES
VEINS- TO HEART
O2 / CO2 Exchange in Capillaries
Oxy-Rich Blood
Cell
The oxygen the blood
cells are carrying is
given to the body’s
tissue.
Tissue
Tissue
Oxy-Poor Blood Cell
And the CO2 (waste) from the
tissue is given to the same blood
cell to be exhaled.
Circulation back to Heart
To upper body
From upper
body
To lung
From
lung
Right
Atrium
Right
Ventricle
From lower
body
•  Capillaries carry the
blood to…
•  Venules that connect to
To lung
veins
From lung
•  The Veins (wide blood
vessels) carry the
Left Atrium
oxygen-poor blood back
to the heart.
Left
Ventricle
•  And the process begins
all over again!
To lower body