A 7-year-old boy who is a refugee from an impoverished country presents with weakness, soreness in his extremities, bruising, and bleeding of the gums. He is diagnosed with scurvy, which is caused by a lack of dietary vitamin C. Vitamin C is crucial for post-translational modification and thus the stability of the spatial arrangement of collagen. Therefore, scurvy has an effect on which of the following cell types in bone?