Relatively deep pit; basinlike depression in a bone, often serving as an articular surface.

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Multiple Choice

Relatively deep pit; basinlike depression in a bone, often serving as an articular surface.

Explanation:
A fossa is a basinlike, relatively deep depression in a bone that often serves as an articular surface for another bone. This term is used for joints and sockets such as the mandibular fossa of the temporal bone (part of the jaw joint) or the glenoid cavity/fossa of the scapula (where the humerus sits). It describes a hollow that accommodates or interfaces with another bone, distinguishing it from a notch (an edge indentation), a meatus (a canal through bone), or a sinus (an air-filled cavity).

A fossa is a basinlike, relatively deep depression in a bone that often serves as an articular surface for another bone. This term is used for joints and sockets such as the mandibular fossa of the temporal bone (part of the jaw joint) or the glenoid cavity/fossa of the scapula (where the humerus sits). It describes a hollow that accommodates or interfaces with another bone, distinguishing it from a notch (an edge indentation), a meatus (a canal through bone), or a sinus (an air-filled cavity).

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