The circulatory and respiratory systems working together
Grade 9 Science Worksheet
Circle the best answer.
Read this first
Use this
Map of blood flow (model, not to scale). Arrows, each marked with what it carries: body to right atrium, oxygen-poor blood; right atrium to right ventricle, oxygen-poor blood; right ventricle to lungs, oxygen-poor blood; lungs to left atrium, oxygen-rich blood; left atrium to left ventricle, oxygen-rich blood; left ventricle to body, oxygen-rich blood. The red blood cell starts on the arrow marked oxygen-rich blood that leaves the lungs.
Jun follows a red blood cell that has just left the lungs in a pulmonary vein. Which places does it pass through next, in order?
- Left atrium, aorta, left ventricle, then the body
- Left atrium, left ventricle, aorta, then the body
- Right atrium, right ventricle, pulmonary artery, then the lungs
- Left ventricle, left atrium, aorta, then the body
Use this
Map of blood flow (model, not to scale). Arrows, each marked with what it carries: body to right atrium, oxygen-poor blood; right atrium to right ventricle, oxygen-poor blood; right ventricle to lungs, oxygen-poor blood; lungs to left atrium, oxygen-rich blood; left atrium to left ventricle, oxygen-rich blood; left ventricle to body, oxygen-rich blood. The blood is on the arrow from the right ventricle.
Kira follows blood that returned from the legs and has passed through the right atrium and right ventricle. Where does it go next?
- Through the pulmonary arteries to the lungs
- Through the aorta to the body
- Through the pulmonary veins to the lungs
- Through the pulmonary arteries to the left ventricle
Use this
Map of blood flow (model, not to scale). Arrows, each marked with what it carries: body to right atrium, oxygen-poor blood; right atrium to right ventricle, oxygen-poor blood; right ventricle to lungs, oxygen-poor blood; lungs to left atrium, oxygen-rich blood; left atrium to left ventricle, oxygen-rich blood; left ventricle to body, oxygen-rich blood.
Luz follows blood from the right atrium around the whole loop and back to the right atrium. How many times does it pass through the heart?
- Once: the heart sends blood to the body and it comes back
- Twice, and both times on the right side of the heart
- Four times, once for each chamber of the heart
- Twice: once on the right side and once on the left side
Vessel X card (textbook facts)
vessel blood goes from blood goes to oxygen in the blood X the right ventricle the lungs low Milo reads a card about vessel X. Which words describe vessel X?
- A vein, because its blood is low in oxygen
- A capillary, because it ends in the lungs
- An artery, because it carries blood away from the heart
- A vein, because it carries blood to the lungs
Vessel Z card (textbook facts)
vessel blood goes from blood goes to wall Z the heart a leg muscle thick Pia reads a card about vessel Z. Which words describe vessel Z?
- An artery, because blood leaves the heart through it and its wall is thick
- A capillary, because it reaches the leg muscle cells
- A vein, because its wall is thick and has valves
- A vein, because it carries blood to the leg muscle
During the ride the leg muscles use more oxygen. On a bike ride, Ren's leg muscles use more oxygen. What happens to the vessels that bring blood to the leg muscles?
- They narrow, so more blood flows to the muscles
- They stay the same width, so the flow does not change
- They narrow, so blood moves faster to the muscles
- They widen, so more blood flows to the muscles
Map (model data, not to scale). Zee reads the arrows for one small vessel to a calf muscle. How many more mL of blood per minute flow when it is widened than when it is at rest?
- 25 mL per minute
- 95 mL per minute
- 70 mL per minute
- 150 mL per minute
Resting heart card (textbook facts)
state heart rate (beats per minute) stroke volume (mL per beat) resting 75 70 Ari reads the heart card for a person at rest. Cardiac output is heart rate times stroke volume. What is the cardiac output?
- 145 mL per minute
- 52,500 mL per minute
- 5,250 mL per minute
- 525 mL per minute
Alveolus oxygen card (textbook facts)
place oxygen (mm Hg) air in the alveoli 100 blood arriving in the lung capillaries 40 Bo reads the air and blood card for the lungs. According to the card, which way does oxygen move at the alveoli, and why?
- From the blood into the air, because the blood must clear it out
- From the blood into the air, because the blood holds more oxygen
- From the air into the blood, because the air holds more oxygen
- It does not move, because oxygen needs a pump to cross
Walk card (model data)
state heart rate (beats per minute) cardiac output (mL per minute) walking 90 6,300 Esme reads the walk card. Cardiac output is heart rate times stroke volume. What is the stroke volume?
- 6,390 mL per beat
- 70 mL per beat
- 7 mL per beat
- 700 mL per beat