Multiple Choice
Why doesn't a flatworm have a circulatory system?
A) The animal is flat enough to permit effective gas exchange by diffusion.
B) There is not enough room for a circulatory system.
C) The animal lacks muscles, so it could not have a heart to pump blood.
D) Only bilaterally symmetrical animals need a circulatory system.
E) Only vertebrates have circulatory systems.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: One purpose of the lymphatic system is
Q3: Figure 44-3 Use the figure to answer
Q4: Which of the following is a mass
Q5: Which of the following has the largest
Q6: Figure 44-1 <br><img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8678/.jpg" alt="Figure 44-1
Q7: The pacemaker is located in the atrioventricular
Q8: Figure 44-2 <br><img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8678/.jpg" alt="Figure 44-2
Q9: A vertebrate's circulatory system would include:<br>A) open
Q10: Match the blood vessel with its description.
Q11: Serum is plasma without the proteins involved