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Science.7 Circulatory System Notes Essential Questions 1. What are the structures of the circulatory system? 2. What is the function of the circulatory system? 3. What is blood and why does it circulate throughout our body? 4. How do the circulatory and respiratory systems work together? Vocabulary circulatory system, heart, blood vessels, arteries, veins, capillaries, blood, fluid, red blood cells, white blood cells, platelets, plasma Name ______________________________ Date _______________________________ Objectives 1. Identify the structures of the circulatory system. 2. Identify the function of the circulatory system. 3. Explain how the circulatory and respiratory systems work together. The Heart is a (cardiac) ____________ that has the job of ___________________________ around the body. The average human heart beats ________ times a minute. What’s in: Red Blood Cells Hold _______________ and carry it to the cells that need it White Blood Cells ‘Eat’ and ___________________ micro-organisms __________ __________ by making antibodies to destroy invaders Platelets Platelets are ______________ of ______________ broken off larger cells. Platelets produce enzymes to form a net. This net traps other blood cells to form a __________ __________. Blood clots __________ bleeding. Where is blood made? _______________________________ 1 The Artery Arteries carry blood _____________ from the heart. They are red because they contain __________ red blood cells Arteries carry oxygen and __________ (digested food) to your body’s cells. Arteries are under ________________ created from the heart beat. Arteries Away The Vein Veins carry blood back __________ to the heart Veins contain blood filled with __________ like __________ __________. Veins have _____________, which act to stop the blood from going in the __________ direction. Why do they appear blue? They __________________________________________________________. They __________________________________________________________. The Capillaries Capillaries __________ arteries to veins They __________ materials from your blood to the cells in your body __________ is dropped off __________ dioxide is picked up 2