Circulatory System PDF Presentation

CIRC UL AT O R Y S Y S T E M  ACTIVITY 1. WHILE SITTING QUIETLY, TAKE YOUR PULSE FOR ONE MINUTE. RECORD IT. 2. RUN IN PLACE FOR ONE MINUTE. THEN COUNT AND RECORD YOUR PULSE FOR 7 CONSECUTIVE MINUTES AFTER YOU STOP RUNNING. QUESTIONS 1. WHY DID YOUR PULSE RATE CHANGE AFTER RUN...

CIRC UL AT O R Y S Y S T E M  ACTIVITY 1. WHILE SITTING QUIETLY, TAKE YOUR PULSE FOR ONE MINUTE. RECORD IT. 2. RUN IN PLACE FOR ONE MINUTE. THEN COUNT AND RECORD YOUR PULSE FOR 7 CONSECUTIVE MINUTES AFTER YOU STOP RUNNING. QUESTIONS 1. WHY DID YOUR PULSE RATE CHANGE AFTER RUNNING? 2. IS THERE ANY DIFFERENCE IN YOUR PULSE RATE BEFORE AND AFTER RUNNING (RUNNING IN PLACE)? YOUR HEART IS A PUMP. IT PUMPS BLOOD THROUGH LITTLE TUBES CALLED ARTERIES. EACH TIME YOUR HEART BEATS, YOUR ARTERIES SWELL SLIGHTLY. THIS IS YOUR PULSE RATE. YOU CAN FEEL YOUR PULSE IN YOUR WRIST.  YOUR CIRCULATORY SYSTEM HAS TWO (2) IMPORTANT FUNCTIONS: 1. TRANSPORT MATERIALS; AND 2. REGULATION OF TEMPERATURE. 1. THE HEART PUMPS BLOOD THROUGH ALL PARTS OF THE BODY. NUTRIENTS, OXYGEN, ANTIBODIES AND HORMONES ARE EFFICIENTLY TRANSPORTED TO THE CELLS. THE BLOOD ALSO CARRIES WASTE PRODUCTS AWAY FROM THE CELLS TO DISPOSAL UNITS LIKE THE LIVER, LUNGS AND KIDNEYS. 2. IT IS ALSO RESPONSIBLE FOR REGULATING TEMPERATURE. WARMER BLOOD FROM THE ON A COOL DAY, TINY BLOOD VESSELS IN YOUR SKIN HAVE CONTRACTED AND VERY CENTER OF THE BODY IS LITTLE BLOOD FLOWS THROUGH THEM; BROUGHT TO THE SURFACE TO BE HENCE, YOUR SKIN APPEARS PALE OR EVEN BLUE. COOLED. IT CUTS DOWN ON LOSS OF HEAT THROUGH YOUR SKIN. ON THE HOT WEATHER, BLOOD VESSELS WIDEN AND ALLOWS MORE BLOOD TO FLOW THROUGH THEM AND INCREASE THE LOSS OF HEAT. THIS MAKES YOUR SKIN PINKER AND FEELS WARMER. HEART, BLOOD, AND BLOOD VESSELS THE HEART… -IS ABOUT THE SIZE OF YOUR CLENCHED FIST ( 12 CM BY 8 CM) -MADE UP OF MUSCLES AND 4 CHAMBERS: *RIGHT AND LEFT ATRIUM *RIGHT AND LEFT VENTRICLE RIGHT ATRIUM - RECEIVES DEOXYGENATED BLOOD FROM THE DIFFERENT PARTS OF THE BODY LEFT ATRIUM -RECEIVES OXYGENATED BLOOD FROM THE LUNGS RIGHT VENTRICLE -GENERATES PRESSURE TO PUSH DEOXYGENATED BLOOD TO THE PULMONARY CIRCULATION LEFT VENTRICLE -GENERATES PRESSURE TO PUSH OXYGENATED BLOOD TO THE SYSTEMIC CIRCULATION FOUR CHAMBERS DOUBLE CIRCULATION PULMONARY CIRCULATION INVOLVES “HEART LUNGS HEART” CIRCULATION SYSTEMIC CIRCULATION INVOLVES “HEART PARTS OF THE BODY HEART” CIRCULATION DOUBLE CIRCULATION VALVES VALVES -PREVENTS THE BACKFLOW OF THE BLOOD IN THE HEART. 2 TYPES OF HEART VALVES *ATRIOVENTRICULAR HEART VALVES *SEMI-LUNAR VALVES ATRIOVENTRICULAR HEART VALVE -PREVENTS THE BACKFLOW OF THE BLOOD FROM THE ATRIUM TO THE VENTRICLE *TRICUSPID VALVE-LOCATED BETWEEN RIGHT ATRIUM AND RIGHT VENTRICLE *BICUSPID VALVE- LOCATED BETWEEN LEFT ATRIUM AND LEFT VENTRICLE SEMI-LUNAR VALVES - PREVENTS THE BACKFLOW OF THE BLOOD FROM THE ARTERIES TO THE VENTRICLES. *AORTIC SEMI-LUNAR VALVE- LOCATED BETWEEN THE LEFT VENTRICLE AND AORTA *PULMONARY SEMI-LUNAR VALVE- LOCATED BETWEEN THE RIGHT VENTRICLE AND PULMONARY ARTERY  BLOOD FLOW right atrium right venticle pulmonary artery lungs pulmonary vein left atrium left ventricle aorta parts of body vena cava cycle repeats BLOOD VESSELS - FORM A NETWORK OF TUBES THAT TRANSPORT BLOOD THROUGHOUT THE BODY - THERE ARE THREE TYPES OF BLOOD VESSELS: *ARTERIES *VEINS *CAPILLARIES ARTERIES -BRANCH OFF FROM THE HEART INTO SMALLER ARTERIES CALLED ARTERIOLES. -THE ARTERIES CARRY OXYGENATED BLOOD EXCEPT THE PULMONARY ARTERIES  VEINS - THEIR WALLS ARE THIN COMPARED TO ARTERIES. - IT BRANCH OFF TO SMALLER VEINS CALLED VENULES. - THE VEINS CARRY DEOXYGENATED BLOOD EXCEPT PULMONARY VEINS. CAPILLARIES - THE WALLS ARE JUST ONE-CELL THICK. - IT FACILITATES THE EXCHANGE OF SUBSTANCES AND CONNECT THE ARTERIES AND VEINS.  Type of Blood Structu Functi Blood Vessel re on Flow Arterie - thick-walled with more - carries blood away from the - maintained by the s muscular and elastic tissue heart contraction of its walls and -small and the heart narrow lumen -very fast and -valves absent high pressure Veins - thin wall with - carries blood - maintained less muscular back to the by the and elastic heart contraction of tissue body muscles -large and - low in wide lumen pressure valves present Capillar - very thin -very small -carries blood to body cells - slow and smooth ies lumen -allows BLOOD -ACTS AS A TRANSPORT MEDIUM OF THE CIRCULATORY SYSTEM, DELIVERS MATERIALS THROUGHOUT THE BODY. -IS A TISSUE CONSISTING OF LIQUID PLASMA AND SOLID BLOOD CELLS. -BLOOD CELLS INCLUDE: *WHITE BLOOD CELLS *RED BLOOD CELLS *PLATELETS PLASMA - IS A YELLOWISH FLUID WHICH TRANSPORTS DISSOLVED SUBSTANCES. -IT ALSO CONTAINS PROTEINS LIKE ALBUMIN, GLOBULIN, FIBRINOGEN AND ANTIBODIES. -IT MAKES UP ABOUT MORE THAN HALF OR 55% OF THE TOTAL VOLUME OF OUR  RED BLOOD CELLS - ALSO KNOWN AS ERYTHROCYTES - HAVE A DONUT-SHAPED AND DO NOT HAVE NUCLEUS -THEY ARE RED DUE TO A SUBSTANCE CALLED HEMOGLOBIN, WHICH IS IRON-CONTAINING MOLECULE -NUMBER IN ONE MM3 OF HUMAN BLOOD: IN MALES- 5,400,000 IN FEMALES- 4,700,000 WHITE BLOOD CELLS - ALSO KNOWN AS LEUKOCYTES -HAVE NUCLEUS BUT LACK IN HEMOGLOBIN -BIGGER THAN RED BLOOD CELLS AND DO NOT HAVE REGULAR SHAPE -PLAYS A MAJOR ROLE IN PROTECTING THE BODY FROM FOREIGN SUBSTANCES AND FROM MICROSCOPIC ORGANISMS LIKE BACTERIA. -NUMBER IN ONE MM3 OF HUMAN BLOOD: 5,000 TO 10,000  PLATELETS -ARE SMALL AND HAVE NO REGULAR SHAPE -ALSO CALLED A THROMBOCYTES -HELP BLOOD TO CLOT AFTER AN INJURY, LIKE WHEN THE SKIN IS WOUNDED ACCIDENTALLY WITH A SHARP BLADE -NUMBER IN ONE MM3 OF HUMAN BLOOD: 140,000 TO 340,000 RESPIRATORY AND CIRCULATORY SYSTEMS: TOGETHER AND WITH OTHER ORGANS CAN YOU RECALL WHAT YOU HAVE LEARNED ABOUT THE MAIN FUNCTION OF THE RESPIRATORY SYSTEM?  THE RESPIRATORY SYSTEM AND CIRCULATORY SYSTEM ARE INTERDEPENDENT WITH ONE ANOTHER. THROUGH THE RESPIRATORY SYSTEM, OXYGEN, THE GIVER OF LIFE, IS ABLE TO ENTER OUR LUNGS; AND FROM THE LUNGS, THE RED BLOOD CELLS PICK UP OXYGEN.  DISEASES OF THE CIRCULATORY SYSTEM 1. ARTERIOSCLEROSIS 2. ATHEROSCLEROSIS 3. ANGINA 4. AORTIC ANEURYSM 5. HEART ATTACK