Frontal Bone

Question 1

How does it develop?

Answer 1

by intramembranous ossification

Question 2

4 parts

Answer 2

squamous, oribital, nasal and frontal sinus

Question 3

Structures in squamous

Answer 3

frontal tuber, supercillary arch, glabella, supra-orbital margin with frontal and supra-orbital notch, zygomatic process,

temporal line, parietal margin.

Internal surface: groove of superior sagittal sinus and frontal crest.

Question 4

Structures of orbital

Answer 4

lacrimal fossa, trochlear fovea, anterior and posterior ethmoidal foramina, ethmoidal notch and sphenoidal margin.

Question 5

Structures of nasal

Answer 5

small unpaired bone located at the nasal root where nasal spine and margin are.

Question 6

Frontal sinus consists of

Answer 6

septum of frontal sinuses and opening of the frontal sinus