It tends to decrease in older adults
The periodontium is the specialized tissues that both surround and support the teeth, maintaining them in the maxillary and mandibular bones. The word comes from the Greek terms περί peri-, meaning "around" and -odont, meaning "tooth". ... Alveolar bone proper. The answer is C
B or D pretty sure it's D though
The epidermal layer of the skin or in sunlight it’s cholecalciferol
