Lecture 3 - Axial Skeleton

Question 1

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

Cranial Bones (8)

Answer 4

Bone Key Features

Frontal (1) Forehead (frontal squama), supraorbital margin, foramina, frontal sinuses

Parietal (2) Sides and roof of cranial cavity; convex external surfaces

Temporal (2) Zygomatic process, mandibular fossa, mastoid process, carotid foramen, jugular foramen, external auditory meatus

Occipital (1) Forms back of skull; foramen magnum, occipital condyles, external occipital protuberance

Sphenoid (1) Articulates with all other cranial bones; sella turcica houses pituitary gland; greater and lesser wings

Ethmoid (1) Forms cranial floor, nasal walls, nasal septum; cribriform plate with olfactory foramina; nasal conchae

Question 5

Facial Bones (14)

Answer 5

Bone Key Features

Nasal (2) Bridge of nose

Maxillae (2) Upper jaw; supports teeth (alveolar processes); forms anterior 2/3 of hard palate

Zygomatic (2) Cheekbones; part of orbit; zygomatic arch formation

Mandible (1) Lower jaw; forms temporomandibular joint (TMJ); attachment for masseter and temporalis muscles

Lacrimal (2) Part of medial wall of orbit; lacrimal sac housing

Palatine (2) Posterior 1/3 of hard palate; lateral nasal wall

Inferior Nasal Conchae (2) Swirl and filter air in the nose

Vomer (1) Forms part of nasal septum

Question 6

Answer 6

Question 7

Answer 7

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12