What term denotes a notch at the edge of a structure?

What term denotes a notch at the edge of a structure?

• A. Notch
• B. Meatus
• C. Sinus
• D. Fossa

Answer: (A)

The edge indentation that defines a notch is the term used for a small cut or groove along the margin of a bone. This differentiates it from other edge or interior features: a meatus is a canal or passageway through a bone, a sinus is a hollow, air-filled cavity inside a bone, and a fossa is a shallow depression that often accommodates another bone or structure. So when the feature described is a notch at the edge, the correct label is notch. For example, the mandibular notch sits along the edge of the mandible, illustrating this edge indentation concept.

The edge indentation that defines a notch is the term used for a small cut or groove along the margin of a bone. This differentiates it from other edge or interior features: a meatus is a canal or passageway through a bone, a sinus is a hollow, air-filled cavity inside a bone, and a fossa is a shallow depression that often accommodates another bone or structure. So when the feature described is a notch at the edge, the correct label is notch. For example, the mandibular notch sits along the edge of the mandible, illustrating this edge indentation concept.