Bones and Cartilages
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Sphenoid Bone
It is an unpaired bone situated at the base of the skull. Its resemblance is of the shape of a butterfly or bat with outstretched wings. Parts It is composed of the following 7 parts: A body. 2 lesser wings. 2 greater wings. 2 pterygoid processes. 2
Body of Mandible – Mandibular Body
The body of the mandible is curved to a certain degree like a horseshoe, structurally. It comprises of two surfaces and two borders. A slight ridge externally marks the mandible in the midline, denoting the symphysis or line of junction of the two pieces from which the
Ethmoid Bone
The ethmoid bone is situated between 2 orbital cavities and is an unpaired delicate bone. It possesses a perforated (sieve-like) plate referred to as cribriform plate that is why it is called ethmoid bone (Gr. ethmoid = sieve-like). Parts The ethmoid bone is made from the following
Cribriform Plate – Lamina Cribriosa
The cribriform plate a.k.a. lamina cribriosa is the horizontal lamina which connects the ethmoidal labyrinths together with the perpendicular plate. Structure 1. It occupies the gap in the middle of the orbital parts of the frontal bone, roofing in the nasal cavities inferiorly, and superiorly creating: The
Inferior Nasal Concha (Turbinate Bone)
There are 2 inferior nasal conchae. Every inferior nasal concha projects downwards from the lateral wall of the nasal cavity. It’s a curved bony plate and presents these features: Medial and lateral surfaces. Superior and inferior edges. Anterior and posterior ends. Medial and Lateral Surfaces The medial
