Lesson 15.3
Your Circulatory System
Tabs:
1. The Body’s Transport System
2. Blood
p. 376
3. Problems and Care
On the Back:
1. Circulation
The Body’s Transport System
 Circulatory System:

Organs and tissues that transport essential material to the
body cells and remove the waste
 Cardiovascular System:

Another name for the Circulatory System
The Body’s Transport System
 Pulmonary Circulation:
 Flow of blood from the heart to the lungs
and back to the heart
 Systemic Circulation:
 Flow of blood from the heart to all of the
body tissue except the lungs
 Atrium:
 Top chambers of the heart
 Pump blood to the ventricles
The Body’s Transport System
 Ventricle:
 Lower chambers of the heart
 Pump blood out of the heart
 Blood flows from atrium to ventricles
 Pulmonary refers to the lungs
 Cardiac refers to the heart
Types of Circulation in the Body
Rt.
-Lung-
Rt.
-Atrium- Lt.
Rt. -Ventricle- Lt.
Body
Lt.
Flow of Blood
1. Rt. Atrium
2. Rt. Ventricle
3. Pulmonary Artery to the
Lungs
4. Lungs
1. Picks up O2 and Drops
off CO2
5. Pulmonary Vein to Heart
6. Lt. Atrium
7. Lt. Ventricle
8. Aorta-largest artery in the
body
9. Body
1. Drops off O2 picks up
CO2
10.Back to Rt. Atrium
Blood
 Blood:
 A mixture of solids in a liquid called plasma
 Plasma:
 92% water, transports blood solids, nutrients,
hormones, and other materials
 Red Blood Cells:
 Carry 02 to cells and CO2 away from cells
 White Blood Cells:
 Helps fight disease and infection by attacking germs
 Platelets:
 Help blood forms clots at would site-prevents blood
loss
Blood
 Blood Vessels:
 80,000 miles of blood vessels that transport
blood throughout the body
 Arteries carry blood away from the heart
 Veins carry blood to the heart
 Capillaries:
 Tiny tubes that carry blood from the arteries to
the body cells and back to veins
 Actual location of O2/CO2 transfer
Blood
 Blood Pressure:
 Measured by a sphygmomanometer
 Systalic Pressure:
 pressure at the highest
 Occurs at ventricular contraction
 Diastolic Pressure:
 Pressure at the lowest point
 Occurs on atrial contraction
 BP is the measurement of the pressure that
blood exerts on the walls of the arteries
Blood
 Blood Types
 A:
 Has A substances
 Accepts A and O blood
 B:
 Has B substances
 Accepts B and O blood
 AB:
 Has both A and B substances
 Accepts A, B,O, and AB blood (universal recipient)
 O:
 Has neither substance
 Only accepts O blood
 Can donate to all types
Blood
 Giving and Receiving Blood
 Mixing blood types can cause dangerous
reactions, even death
 Can give blood between ages of 17-70
 Blood is frozen/refrigerated at blood
bank
 New needles are used for each donor
 Blood is tested for disease
 Positive blood is discard and donor may be
notified
Problems of the Circulatory
System
 Hypertension:
 Blood pressure is consistently high
 Can lead to heart attack, stroke, kidney
and other organ failure
 Stroke:
 Results from blood clot that blocks
vessels in the brain or a rupture of a
blood vessel in the brain
Problems of the Circulatory
System
 Heart Attack:
 Blockage in the flow of blood to the heart
 Arteriosclerosis:
 Hardening of the arteries
 Reduces the amount of blood that can
flow through them
 Anemia:
 Abnormally low level of hemoglobin
Problems of the Circulatory
System
 Leukemia:
 Disease in which extra white blood cells are
produced
 Hemophilia:
 Disease in which the plasma doesn’t
contain substances that help the blood to
clot
Care of the Circulatory System
 Limit Fat in Your Foods:
 Fatty deposits can form on the walls of
your arteries
 Causes narrowing
 Increases blood pressure
 Makes heart work harder to circulate blood
 Damages organs
 Get Regular Physical Activity:
 Strengthens heart muscle
 Heart beats more efficiently
Care of the Circulatory System
 Avoid Tobacco:
 Contain nicotine
 Narrows arteries
 Increases blood pressure
 Manage Stress:
 Stress makes body secrete adrenaline
 Increases blood pressure