Figure 10.

Ventral system. Top: schematic diagram (based on Gyps fulvus) visualizing the muscle topology (the relevant muscle is highlighted in color). The M. longus colli ventralis in ventral view (A) Gyps fulvus and (B) Aegypius monachus (the M. rectus capitis ventralis and the M. rectus capitis lateralis have been removed in A. monachus). The muscle originates from the ventral processes of the first four thoracic vertebrae. It inserts ventrolaterally into the last cervical vertebra (CV15 in G. fulvus, CV13 in A. monachus). Scale bar: 1 cm