Which is not true about development of the axial skeleton?
A)The sternum forms by fusion of the sternal bars.
B)The parietal and frontal bones develop by intramembranous ossification.
C)The sphenoid bone forms by endochondral ossification.
D)The vertebrae form secondary ossification centers at puberty.
E)The ribs and clavicles form from schlerotomes.

Question

Quizplus · Accepted Answer

The ribs and clavicles do not form from sclerotomes. The ribs form from costal processes of the thoracic vertebrae, which are indeed derived from sclerotomes, but the clavicles form by intramembranous ossification, not directly from sclerotomes. Sclerotomes contribute to the formation of the vertebral column.

Which Is Not True About Development of the Axial Skeleton