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Name: Date: Group: SCIENCE TEST TUESDAY, November 29th Know the following vocabulary: 1. Heart rate - ______number of times your heart beats in a period of time (BPM) 2. Circulatory System – _______transports blood through body. Blood carries its products throughout body and travels through arteries, veins and capillaries 3. Respiratory System – _____takes in oxygen gets rid of carbon dioxide _**respiratory and circulatory system combine together to form cardiovascular system _____________________________________________________________________________ *** Note: KNOW HOW THESE TWO (above) SYSTEMS WORK TOGETHER*** Feel the Beat! 4. Villi help to increase the surface area of the small intestines. Why is this important to the circulatory system? _____The circulatory system has to have a lot of surface area to ensure that blood can transport all of its products to all parts of the body/cells. The capillaries have the largest surface area of all vessels because they are so tiny and abundant. _________________________________________________________________________ 5. List the order of the blood vessels from smallest to largest and their functions (which/what kind of blood flows through them) _____capillaries (smallest vessels connect art and veins together. Gas and nutrient exchange ) veins (bring blood back IN to the heart), arteries (move oxygenated blood Away from the heart)_________________________________________________________________________ 6. List four things the blood transports (Look back at your bloodmobile song or warmup). ________gases(o2/ co2) hormones, nutrients, and white blood cells 7. Why is exercise important for cardiovascular health? (Feel the Beat) ____Exercise make the heart stronger. The heart is a muscle; the stronger it is the better it is a pumping blood around the body. __________________________________________________________________________ ______________________________________________________________________________ 8. How is the heart structured to prevent blood from flowing backwards? __________the valves prevent blood from flowing the wrong direction. 9. What happens to your pulse when you exercise? Why? After you exercise? Why? _when you exercise your pulse rate increases (gets faster) because you need to bring in more oxygen because your muscles are using it up faster. Your pulse rate slowly starts to go back down but it takes a little bit because your muscles are still using up that oxygen _____________________________________________________________________________ 10. Explain what would happen to your resting pulse and recovery rate if you were to start exercising regularly for several months? Resting pulse would become lower, recovery rate (the amount of time it takes you to get back to resting rate ) would be faster. The heart is a muscle the stronger you make it the more efficient it is at doing its job! ______________________________________________________________________________ 11. Label the four chambers of the heart and describe the flow of blood through the heart. (think of the four “rooms” or chambers of the heart) Right to lungs (exhale Co2) Left atrium Right atrium Valves Left ventricle Right Ventricle Left to body (o2 rich) __you breathe in oxygen goes through lungs into capillaries to blood; the blood enters the left side of heart (atrium) and is then pumped out to body from left side. (Oxygen rich blood has LEFT your heart to be pumped to your body). As the oxygen rich blood travels around your body it pick up cellular waste products (CO2) and the VeINs bring that waste back IN to the right side of your heart where it pumps the blood right back into the lungs so the Co2 can be exhaled ______________________________________________________________________________ 12. What sound does a heart-beat make? What causes this sound? _____Lub dub is the sound of the valves opening and closing 13. What process in the human body produces carbon dioxide? What does this do for the organism? __Cellular respiration: as the cells use up the oxygen they are producing Co2. This keeps our cells alive and functioning because a buildup of waste would kill the cells ____________________________________________________________________________ 14. How do the circulatory and respiratory systems work together? __the respiratory system brings in the oxygen which is exchanged into the blood and then sent to the heart to be pumped around our body and used. The blood then comes back to the heart and is pumped back into the lungs so that CO2 can be exhaled. The circulatory system is responsible for moving the blood through the heart and blood vessels. The respiratory system and the circulatory MUST work together to do the job of getting nutrients, hormones, white blood cells and gases around your body. Together they make the cardiovascular system!!!______________________________________________________________________ ________