The Letter a in the Image Below of the Paranasal

question 28

Multiple Choice

The letter A in the image below of the paranasal sinuses labels the:

• A) frontal sinuses.
• B) ethmoid sinuses.
• C) sphenoid sinuses.
• D) crista galli.

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Definitions:

Haversian Canal

The central channel, containing blood vessels and nerves, found in the osteon or structural unit of compact bone.

Canaliculi

Small, channel-like structures within bone tissue that allow for communication and nutrient transfer between blood vessels and osteocytes.

Long Bone

A type of bone that is longer than it is wide and is characterized by a shaft and two ends, playing a crucial role in supporting weight and facilitating movement.

Short Bone

A type of bone that is as wide as it is long, providing support and stability with little movement, such as the bones in the wrist and ankle.