To carry needed substances to
cells and carries waste
products away from cells.
•The heart has
a right side and
a left side.
•Each side has
Atrium- the upper chambers that receives
blood that comes into the heart
Ventricle- the lower chambers that pumps
blood out of the heart
Valve - a flap of tissue that prevents blood from
Pacemaker in the right atrium sends out
signals that make the heart muscle contract
Arteries carry blood away from the heart
Veins carry blood back to the heart.
Capillaries are tiny vessels where substances
are exchanged between the blood and body
Capillary walls are only one cell thick.
Substances can pass easily through them.
Materials like oxygen and glucose pass from
the blood into body cells. Cellular waste
products move from cells into the blood.
In which vessel is the pressure going to be greatest?
On the left side (change
this in your notes), blood
travels from lungs to the
heart and then to the body.
•Oxygenated blood- oxygen
On the right side (change
this in your notes), blood is
pumped through the body
and then returns again to the
•Deoxygenated blood- oxygen
Oxygen-poor blood is pumped into the 1. right
atrium 2. right ventricle 3. pulmonary
artery to the 4. lungs, where it picks up
oxygen back to the 5. pulmonary veins back
into 6. left atrium 7. left ventricle 8. aorta
Blood pressure is the pressure that
blood exerts on the walls of blood
It is caused by the force with which the
As blood moves away from the heart, its
Blood pressure is highest in the arteries.
A sphygmomanometer is an instrument
that measures blood pressure.
Blood is made up of four
◦ Red blood cells
◦ White blood cells
The liquid part of blood.
Plasma is mostly water.
10 percent is made of dissolved
materials such as food molecules,
vitamins and minerals for the body,
waste products, and plasma proteins.
Carry oxygen to the body cells
Contain hemoglobin, an iron-
containing protein that binds
chemically to oxygen molecules
Produced in the bone marrow
Have no nuclei no need for a
Part of the immune system to fight off
disease causing organism
Bigger than red blood cells
Produced in the bone marrow
Help form blood clots. They collect and stick
to any site where a blood vessel is cut.
Platelets then release chemicals that cause
the production of the chemical fibrin.
Fibrin weaves a net of fibers across the
wound. The net traps blood cells and a clot is
Cardiovascular disease is the leading cause of
death in the United States.
Atherosclerosis is a condition in which an artery
wall thickens due to the buildup of fatty materials.
Heart attacks occur when the blood flow to part of
the heart muscle is blocked.
Cells die in the part of the heart that does not
receive blood. This permanently damages the
Hypertension is a disorder in which a person’s
blood pressure is consistently higher than normal.
◦ Hypertension makes the heart work harder.
◦ It also may damage the walls of the blood vessels over time.
Engineers work with Doctors to come up
with solutions to issues affecting the
Engineer: a person who applies his/her
understanding of science and math to
create things for the benefit of the world.
Bioengineering: the use of artificial
tissues, organs or organ components to
replaced damaged or absent parts of the
body with artificial limbs and pacemakers.
Biomedical Engineer: a person who blends
traditional engineering techniques with the
biological sciences and medicine to
increase quality of human health and life.
To help maintain cardiovascular
◦ exercise regularly
◦ eat a balanced diet that is low in fat,
cholesterol, and sodium
◦ avoid smoking