cranium

Question 1

cranium

Answer 1

8 bones; encloses and protects the brain

Question 2

frontal bone

Answer 2

forehead; bony projections under the eyebrows, superior part of eye orbits
-SUPERCILIARY ridges (eyebrows)

Question 3

parietal bones

Answer 3

2; articulate together at saggital suture to form roof of the cranium

Question 4

temporal bones

Answer 4

2; inferior to parietal
-external acoustic meatus: leads toward inner ear
-provides a jugular foramen and carotid canal for major blood supply to brain

Question 5

occipital bone

Answer 5

makes back and floor of the cranium
-foramen magnum: spinal cord passes through it

Question 6

sphenoid bone

Answer 6

-bat/butterfly shaped posterior to frontal bone
-OPTIC CANALS: round hole which optic nerves pass through
-unique depression called the STELLA TURCICA that houses pituitary gland

Question 7

ethmoid bone

Answer 7

deepest cranial bone; anterior to sphenoid bone and posterior to nasal bone
-forms roof of nasal cavity
-CRIBRIFORM PLATE: divides cranial cavity from nasal cavity