Transcript Human Body Systems

Circulatory System
What does the transport system do?
Carries
O2, CO2,
nutrients, hormones,
wastes, cells of the
immune system
Regulates body temp.
Circulatory System
Also
known as the
Cardiovascular System.
It carries needed
substances to cells and
carries waste products
away from cells.
The Heart – pumps blood through
body
Inside the heart
Blood Vessels
Arteries
– carry blood away
from heart – thick round
muscular walls- no valves
Blood Vessels
 Veins
– carry blood to the heart –
has valves to prevent backflow – thin
flattened shape
Blood Vessels
 Capillaries
– one cell thick
What’s in blood?
Plasma –carries
nutrients, wastes,
and water
 Red Blood Cells –
carry oxygen and
carbon dioxide
 White Blood Cells
– fight infections
 Platelets – help
with blood clotting

How do RBC’s carry Oxygen?
 Hemoglobin
– a protein found on
RBC attaches itself to both oxygen
and carbon dioxide
Pulmonary Circulation
Blood
flows from the
heart to the lungs
where it picks up O2
and loses CO2 and
water vapor
Pulmonary Circulation
Artery
Transports
blood away
from the heart.
Very Muscular
Very Elastic
Thick Muscle Walls
Aorta  Largest Artery
Carries oxygenated
blood
Veins
Transports
blood
toward the Heart
Thinner walls
Valves Prevents
backflow
Carries deoxygenated
blood
Capillaries
One celled
microscopic blood
vessels
Connect
Arteries Veins
Heart Muscular
organ pumps blood
throughout the body
Valve flap of tissue
that prevents blood
from flowing
backwards.
Atrium2
upper
chambers,
receive
blood that
comes into
the heart
Ventricle
 2 lower
chambers
, pumps
blood out
of heart
Pericardium
Covers
and
protects the heart
What
are the
different types of
molecules that
are transported
throughout the
circulatory
system?
Molecules that travel
through Circ.
Nutrients
from
digested food
O2 from the lungs
Metabolic wastes
(CO2)
Molecules that travel
through Circ.
Hormoneshelp
coordinate activities
in body
Heatblood vessels
constrict or relax
Regulation of Heartbeat
Pacemaker
 located in
the right atrium, sends
out signals that make the
heart muscle contract.
It receives messages
about how much oxygen
is present
A “Real Pacemaker”
Medical Pacemaker
High Blood Pressure
Disease
caused when
blood pressure in the
arteries is increased
by stress, diet,
heredity, smoking, &
aging.
Stroke
When an area of
the brain dies
because the area
didn’t receive
enough O2
Heart Attack
Symptoms
sharp,
crushing, squeezing
pain in the chest, cold
sweats, nausea, limb
numbness
An area of the heart
muscle dies and stops
working
Coronary Thrombosis
Type
of heart attack
caused by blockage in
one of the arteries
that carry blood to
the heart. Blockage of
blood flow to the
heart, damaged from
lack of oxygen
Leukemia
Form
of cancer in
which bone marrow
makes too many
white blood cells
Anemia
When
the blood
doesn’t have
enough hemoglobin
or RBC causing
body cells to not
receive enough O2
Arteriosclerosis
 Fatty
plaque builds up on wall of
artery blocking normal blood flow
Amazing Heart Facts
Your heart is about
the same size as your
fist.
 An average adult
body contains about f
five quarts of blood.

By
the time you turn
70, your heart will
have beat some twoand-a-half billion times
(figuring on an average
of 70 beats per minute.)
The
risk of heart attack
is higher on Monday
than any other day of
the week.
Each
square inch of
human skin consists
of twenty feet of
blood vessels.
All
the blood vessels
in the body joined
end to end would
stretch 62,000 miles
or two and a half
times around the
earth.
1.The heart circulates the
body's blood supply
about 1,000 times each day.
2. The heart pumps the
equivalent of 5,000 to
6,000 quarts of blood
each day.