2 By the end of this lesson on circulation you should be able to: Describe the structure of the circulatory systemCompare and contrast arteries, veins and capillariesExplain how nutrients and oxygen are carried to your body cellsExplain how wastes are removed from your body cellsCompare and contrast the three types of blood cells
3 What is it?Pumps and transports blood through a series of vessels in your body
4 Main Functions:Supplies oxygen and nutrients to the cells of your bodyRemoves wastes from the cells of your bodyWorks closely with what other system???
5 The Heart Composed almost entirely of muscle Surround by a protective tissue called pericardiumMyocardium – largest, middle tissue layer responsible for contractionsSeptum, or wall, divides the left and right heart separating the oxygen-rich & oxygen-poor bloodFour chambersContracts ~72/minute pumping ~70 ml each time
6 Heart ChambersAtrium – thinner, upper chamber that receives the blood from the body or lungsVentricle – lower chamber that pumps the blood out to the body or lungsblood flow
7 Blood Circulation in the Body Pulmonary Circulation - pumps deoxygenated blood from the heart to the lungsSystemic Circulation - pumps oxygenated blood to the rest of the bodyWhat happens in the lungs?CO2 waste leaves the blood and enters the lungs and O2 leaves the lungs and enters the blood vessels
8 Blood Circulation in the Heart Flaps of connective tissue, called valves prevent blood backflowThe pacemaker, a group of cardiac muscle cells, sets the pace of the hearts contractionspacemakerAverage Heart rate is bpm. What is your resting rate?
9 Blood Circulation throughout the body Arteries - large vessels that carry blood from the heart to the body tissuesCapillaries -small, thickness of one cell; delivery system to all body tissuesVeins - keeps blood moving back toward the heart; contain valves
10 What does blood pressure mean? The force of blood on the walls of the arteries after the heart contracts1st number - systolic pressure - force in the arteries when the ventricles contract2nd number - diastolic pressure - force in the arteries when the ventricles relaxHealthy is ~ 120/80
11 Blood A connective tissue containing dissolved substances and cells Collects oxygen from the lungs, nutrients from the digestive tract and wastes from tissues4-6 liters in body55% plasma - water, dissolved gases, salts, nutrients, enzymes, hormones, wastes and proteins
12 RED BLOOD CELLS - erythrocytes Most of blood cellsContain the red colored hemoglobin - iron containing pigment that binds to O2Disc shaped cells that do not have a nucleus when mature (live an average of 120 days)Produced where???
13 WHITE BLOOD CELLS - leukocytes Less common; without hemoglobinGuard against infection, fight parasites, and attack bacteriaContain nuclei & live longerMade where???
14 LymphocytesWhite blood cells that produce antibodies to destroy pathogens
15 What were platelets?Sticky cell fragments that form blood clots in areas where blood vessels are brokenSignals proteins called clotting factors to stop the bleeding
16 The Lymphatic System ★ ★ A network of vessels, nodes, and organs that collects fluid that leaks from the blood vesselsThe nodes collect foreign microorganisms
17 By the end of this lesson on respiration you should be able to: Identify the function of the respiratory systemExplain how the process of gas exchange is involved in breathingExplain how the nose, pharynx, larynx, trachea, lungs and aveoli are involved in breathingExplain how the respiratory system works with other systems in order to maintain homeostasis
18 What is respiration?The process of gas exchange between the lungs and the environmentCO2 (cellular respiration) waste is removed from the body and O2 is taken up by the body in the tissues of the lungsWhy do our body cells need O2? Why hemoglobin?
19 Each breathe… How is breathing controlled??? Why mucus??? Air enters through the mouth or nosePharynx – passageway for air and foodLarynx – contains the vocal cordsTrachea – windpipeBronchi – 2 passageways leading to the lungsBronchioles – smaller divided passagewaysAlveoli – tiny air sacs surrounded by capillaries where gas exchange occursHow is breathing controlled???Why mucus???Respiration
20 Label and trace the path of air Inhalation and Exhalation Clip
21 Why in the world would you ever choose to smoke? GROSS ME OUT!!!!!!!!!!!!!!!