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THE CIRCULATORY SYSTEM S7L2.e. Explain the purpose of the major organ systems in the human body(digestive, respiration, reproduction, THE CARDIOVASCULAR SYSTEM Learning Targets 1. 2. I can explain the purpose of the circulatory or cardiovascular system. I can explain how the circulatory system helps serve the needs that cells have for oxygen, food, and waste removal. Function: The cardiovascular system carries needed substance to cells and carries waste products away from cells. In addition, blood contains cells that fight diseases. VIDEO INTRODUCTIONS & SUPPORT 1st & 2nd Introduction video https://www.youtube.com/watch?v=AIcAF34MPpU 6th & 7th Introduction video BrainPop https://www.brainpop.com/health/bodysystems/circulato rysystem/ Blood Pressurehttps://www.brainpop.com/health/personalhealth/bloodp ressure/ https://www.youtube.com/watch?v=-s5iCoCaofc Follow up video – Bill Nye on the Heart https://www.youtube.com/watch?v=GbttJ-5do9M TRANSPORTATION SYSTEM BY WHICH OXYGEN AND NUTRIENTS REACH THE BODY'S CELLS, AND WASTE MATERIALS ARE CARRIED AWAY. ALSO CARRIES SUBSTANCES CALLED HORMONES, WHICH CONTROL BODY PROCESSES, AND ANTIBODIES TO FIGHT INVADING GERMS. www.biosbcc.net/doohan/ sample/htm/heart.htm PARTS OF THE CIRCULATORY SYSTEM Divided into three major parts: The Heart 2. The Blood 3. The Blood Vessels 1. THE HEART, THE LUNGS, AND THE BLOOD VESSELS WORK TOGETHER TO FORM THE CIRCLE PART OF THE CIRCULATORY SYSTEM. CIRCULATION Two parts Heart acts as double pump Blood from the right side pump is dark red and low in oxygen (oxygen-poor) CIRCULATION Travels through pulmonary arteries to lungs where it gets fresh oxygen and becomes bright red Blood from lungs through pulmonary veins back to the heart's left side pump Pumped out into the body 3 KINDS OF CIRCULATION: Pulmonary Coronary Systemic circulation circulation circulation PULMONARY CIRCULATION Movement of blood from the heart, to the lungs, and back to the heart again CORONARY CIRCULATION Movement of blood through the tissues of the heart SYSTEMIC CIRCULATION Supplies nourishment to all of the tissue located throughout the body, except for the heart and lungs BLOOD VESSELS Hollow tubes that circulate your blood THREE KINDS OF BLOOD VESSELS Arteries Veins Capillaries ARTERIES Carry blood AWAY from the heart Heart pumps blood Main artery called the aorta Aorta divides and branches Many smaller arteries Each region of your body has system of arteries supplying it with fresh, oxygen-rich blood. ARTERIES Tough on the outside Smooth on the inside Muscular wall helps the heart pump blood (What kind of muscle is this?) Have strong, muscular walls The inner layer is very smooth so that the blood can flow easily http://hes.ucf.k12.pa.us/gclaypo/circdia.html CAPILLARIES Very thin Only one cell thick Connect arteries & veins CAPILLARIES Food and oxygen released to the body cells Carbon dioxide and other waste products returned to the bloodstream w3.uokhsc.edu Remember Cellular Processes? What is this movement across a selectively permeable membrane called? Valves are located inside the veins. The valves only allow blood to move in one direction. These venous valves keep blood from moving backwards. VEINS Carry blood to the heart Receive blood from the capillaries Transport waste-rich/ oxygen-poor blood back to the lungs and heart Valves Allow Veins are located inside the veins blood to move in one direction have smooth muscle to help move blood back up to the heart. THE HEART Size of your fist Thick muscular walls Divided into two pumps Each pump has two chambers Upper chamber - atrium receives blood coming in from the veins Lower chamber - ventricle squeezes blood out into the arteries http://hes.ucf.k12.pa.us/gclaypo/circdia.html Close up of heart valves Heart sounds are made by the valves as they open and close BLOOD Pumped by your heart. Travels through thousands of miles of blood vessels Carries nutrients, water, oxygen and waste products to and from your body cells. Made up of liquids, solids and small amounts of oxygen and carbon dioxide. BLOOD Red blood cells carry oxygen from the lungs to all the cells of the body. Takes carbon dioxide and transports it back to the lungs About 5,000,000 Red Blood Cells in ONE drop of blood. BLOOD White blood cells protect the body from germs comes from the Lymphatic System. Attack and destroy germs when they enter the body www.merck.com/pubs/mmanual_home/ illus/167i2.htm BLOOD Platelets are blood cells that help stop bleeding What are platelets and what do they do? BLOOD Plasma is the liquid part of the blood About half of your blood is made of plasma The plasma carries the blood cells throughout the body Plasma is made in the liver. What is Blood Pressure? • Blood pressure is a measure of the force exerted by the blood on the wall of the arteries. • An example is 120/80 (systolic pressure/diastolic pressure. • Systolic pressure is the result of the contraction of the ventricles (normal 110-140) • Diastolic pressure is during the ventricle relaxation (normal 70-90)