Lesson 15.3 Your Circulatory System p. 376 Tabs: 1.The Body’s Transport System 2.Blood 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

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 flow away from the heart  Veins flow 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 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