ZOOL 2403 Practical #1 Questions with well explained answers

Frontal Bone - Answer-- bone that forms the forehead - superior to the eyes - most anterior bone on the skull supraorbital notch - Answer-- notch in the ridge of the eye socket Parietal Bone - Answer-- the most superior portion of the skull - found on either side of the skull Occipital Bone - Answer-- the most dorsal and inferior portion of the skull - back of head Foramen Magnum - Answer-- large hole located in the inferior portion of the skull - where spinal chord articulates with the brain Jugular Formen - Answer-- holes located laterally from the foramen magnum - jelly bean-shaped Hypoglossal Foraman - Answer-- small holes directly lateral to foramen magnum - located between the jugular foramen and the foramen magnum Occipital Condyle - Answer-- located at the base of the skull - oval-shaped, smooth projections located on either side of the foramen magnum - 1st cervical vertebrae articulate with skull Temporal Bone - Answer-- most lateral bones on either side of the skull- located near the region of the ear External Auditory Canal - Answer-- holes on the most lateral part of the skull - "ear holes" Internal Auditory Canal - Answer-- found inside of the skull - lateral, just superior to that of the jugular foramen Styloid Process of the Temporal Bone - Answer-- long, thin projection on the lateral and inferior of the skull - located on the temporal region Mastoid Process - Answer-- smooth projections inferior to the external auditory canal - located in the temporal bone - attachment site for certain neck muscles Stylomastoid Foramen - Answer-- the lateral inferior side of the skull - located between the styloid process of the temporal bone and the mastoid process of the temporal bone Sphenoid Bone - Answer-- a bat-shaped structure located in the medial portion of the skull - anterior of the occipital bone and posterior of the ethmoid bone Sella Turcica - Answer-- "turkish saddle" - saddle-shaped structure in medial portion of sphenoid bone - protects the pituitary gland Optic Foramen - Answer-- located above the sella turcica on either side - creates a pathway for optic nervesSuperior Orbital fissure - Answer-- a cleft in between the greater and lesser wings of the sphenoid bone - can be seen through the eye sockets Lesser Wing - Answer-- The triangular bone located laterally from the optic canals - It is located in the sphenoid bone - It is the most superior portion of the sphenoid bone Greater Wing - Answer-- larger wing-shaped bone - in the more inferior part of the sphenoid bone - either side of the Sella Turcica Foramen Rotundum - Answer-- circular-shaped hole - inferior to the superior orbital fissure in the greater wing of the sphenoid bone Foramen Ovale - Answer-- oval-shaped hole - inferior to the foramen rotundum in the greater wing of the sphenoid bone Ethmoid Bone - Answer-- located between the sphenoid bone and the frontal bone crista galli - Answer-- "rooster's crest" - the medial thin ridge in the ethmoid bone cribiform plate - Answer-- region on either side of the crista galli in the ethmoid bone Nasal Bone - Answer-- 2 small oblong bones - either side at the middle and upper part of the face that forms the "bridge" of the nose inferior nasal conchae - Answer-- ridges on the inside of the nose- extend horizontally on the lateral walls of the nasal cavity - most inferior ridge Lacrimal Bones - Answer-- located in the medial wall of the eye socket - the smallest bone on the face - tear duct found at the most inferior portion zygomatic bone - Answer-- "cheekbone" - 4 borders located in the upper and lateral parts of the face - lateral to the maxilla (upper jaw bone)