A researcher has sectioned a mouse embryo, and has noticed that certain muscle components (especially myosin) aggregate around the early-stage cartilage of the ribs. Which of the following is TRUE of these presumptive muscles?
A) Since they associate with the ribs, these muscles are likely components of the diaphragm.
B) Since they associate with the ribs, these muscles are likely developing intercostal muscles.
C) These muscles (when they are fully developed) will help to regulate the volume of the thoracic cavity.
D) These muscles likely only serve a supportive role for the ribs, and will play no role in breathing.
E) Since they associate with the ribs, these muscles are likely developing intercostal muscles. As a result, these muscles (when fully developed) will help to regulate the volume of the mouse's thoracic cavity.
Correct Answer:
Verified
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