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The Circulatory System Mr. Price 7th Grade Manteo Middle School An Overview of the Circulatory System ► Before going into the Circulatory system lets look at a short video to help you preview some of the concepts. ► https://www.brainpop.com/search/searc h.weml?keyword=circulatory+system Where the Heart is located Circulatory or Cardiovascular System ► Circulatory System – Keeps the body working by delivering oxygen to body cells and removing waste (Co2) from the cells. Delivering Removing Parts of the Circulatory System ► The Heart - is divided into FOUR Chambers Two types of Arteries ► Arteries start with A takes blood away !! ► Aorta – Largest blood vessel in the heart ► Pulmonary Artery – Carries blood containing carbon dioxide from your heart to your lungs Three Types of Veins ► Veins start with V brings blood back to me 1. Inferior Vena Cava – Where the blood enters the heart from the body. 2. Superior Vena Cava – Where the blood enters the heart from the body. 3. Pulmonary Vein – Carries blood-containing oxygen from your lungs to your heart. The Four Valves of the Heart ► Tricuspid Valve – Lets the blood fill in the right atrium before it enters the right ventricle. ► Bicuspid Valve – Lets the blood fill in the left atrium before it enters the left ventricle The Four Valves of the Heart ► ► ► Right Semi lunar ValveLets the right ventricle fill before releasing the blood into the pulmonary artery. Left Semi lunar Valve – Lets the blood fill in the left ventricle before sending it to the aorta Septum – Divides the heart in half Three Kinds of Blood Vessels ► Arteries – Carries blood away from the heart ► Veins – Carries blood back to the heart ► Capillaries – Delivers low-oxygen blood to veins (Smallest) Parts of the Blood ► Red Blood Cells – Made in bone marrow; carries oxygen, food, and rids body of CO2 and Waste ► White Blood Cells – Help fight disease and infection by destroying bacteria and germs that enter the body. Made in the lymph nodes Parts of the Blood ► Platelets – Help blood to clot, to prevent excess bleeding. ► Plasma – Water portion of the blood; 55% of blood is plasma Four Types of Blood ► Type A: 42% ► Type B: 10% ► Type AB: 3% ► Type O: 45% ► RH Factor = is the Accepts A and O Accepts B and O Accepts AB and O Universal Donor + and – of the blood Four Filters of the Blood 1. Liver 2. Kidneys 3. Lymph Nodes – located in the neck 4. Spleen – Cemetery for the red blood cells How Blood Moves Through the Heart How Blood Moves Through the Heart Blood Disorders Blood Pressure: (Hypertension) The force or pressure developed by the heart, which acts to pump blood through the circulatory system. Blood Pressure Two Distinct pressures that are measured!! Systolic: A measure of the maximum force or pressure developed in the arteries when the heart contracts Diastolic: A measure of the lowest pressure, which occur in the arteries during cardiac relaxation. Blood Pressure High Blood Pressure: Continuous elevation of blood pressure above the normal range. Ex. 140/90 Blood Pressure ► Sphygmomanometer: An instrument used to measure blood pressure. ► Stethoscope: An instrument used to listen to the sounds of the heart, or listen to the flow of blood through the vessels when measuring the blood pressure. Arteriosclerosis ► Arteriosclerosis: Artery walls harden; caused by a diet high in fat and cholesterol. ► Causes: Smoking Diabetes High Blood Pressure High Cholesterol Overweight Arteriosclerosis ► Arteriosclerosis - We will watch how arteriosclerosis builds up on the walls of an artery. - Overview of the Circulatory system. Overview of the Circulatory System Arteriosclerosis ► Prevention: Reduce the amount of stress in your everyday life Change diet to reduce the amount of sodium, fats and cholesterol. Regular Medical checkups ► Treatment: Medication Exercise Diseases and Disorders of the Circulatory System ► Heart Attack: Stoppage in the flow of blood to the heart. ► Prevention: Reduce Stress Change Diet to less intake of Sodium (Salt) Eat less foods high in fat and cholesterol Diseases and Disorders of the Circulatory System ► Anemia: Lack of red blood cells or cells that do not carry enough oxygen; may cause weakness and low energy levels. ► Prevention: Eat foods that are rich in Iron Treatment: Rest Diseases and Disorders of the Circulatory System ► Sickle Cell Anemia: Your blood is unable to circulate properly. ► There is no prevention for sickle-cell anemia since you are born with it. ► Treatments: Blood Transfusions Medication ► Normal ► Blood Cell Sickle Cell Diseases and Disorders of the Circulatory System ► Leukemia: Abnormal white blood cells In time they may crowd out normal white blood cells, red blood cells, and platelets. Diseases and Disorders of the Circulatory System ► Stroke: Happens when a cluster of blood cells blocks blood vessels in the brain. ► Stroke Stroke is a “Brain Attack” Diseases and Disorders of the Circulatory System ► Prevention: Don’t Smoke Drink in moderation (21) Get cholesterol checked Exercise 30 minutes daily Consume a low fat diet ► Treatment: Medication Rehabilitation Brain-Pop Review Quiz ► Brain-Pop Videos 1, 2, 3. Please write your name on your paper and number your paper 1-30. We will go over 3 Brain-Pop videos and you are will be writing the letter of each answer on your paper. For each question you will have 1.30 sec to answer. Quiz is on Circulatory System, Heart and Human Body