Figure 20-1 The Heart

Use Figure 20-1 to answer the following questions:
-Identify the structure(s) labeled "8."
A) moderator band
B) pectinate muscles
C) papillary muscles
D) trabeculae carneae
E) chordae tendineae

Question

Figure 20-1 The Heart
 
Use Figure 20-1 to answer the following questions:
-Identify the structure(s) labeled "8."
A) moderator band 
B) pectinate muscles 
C) papillary muscles 
D) trabeculae carneae 
E) chordae tendineae

Quizplus · Accepted Answer

The structure labeled "8" in Figure 20-1 is the papillary muscles, which are found in the ventricles of the heart and attach to the chordae tendineae to prevent the atrioventricular valves from inverting into the atria during contraction of the ventricles. The other structures listed (moderator band, pectinate muscles, trabeculae carneae, and chordae tendineae) are also found in the heart, but are not labeled as "8."

Figure 20-1 the Heart