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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!!!______________________________________________________________________
________