Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


CHP8 Skeletal; Cranial Bones and Their Markings; Sphenoid

Sphenoid Keystone of the cranial floor; forms its midportion; resembles a bat with wings outstretched and legs extended downward posteriorly; lies behind and slightly above the nose and throat; forms part of the floor and sidewalls of the orbit
Body Hollow, cubelike central portion
Greater wings Lateral projections from the body; form part of the outer wall of the orbit
Lesser wings Thin, triangular projections from the upper part of the sphenoid body; form the posterior part of the roof of the orbit
Sella turcica Saddle-shaped depression on the upper surface of the sphenoid body; contains, the pituitary gland; literally "turkish saddle"
Sphenoid sinuses Irregular mucosa-lined, air-filled spaces within the central part of the sphenoid
Pterygoid processes Downward projections on either side where the body and greater wing unite; comparable to the extended legs of a bat if the entire bone is likened to this animal; form part of the lateral nasal wall
Optic foramen Opening into the orbit at the root of the lesser wing; transmits the optic nerve
Superior orbital fissure Slitlike opening into the orbit; lateral to the optic foramen; transmits the third, fourth, and part of the fifth cranial nerves
Foramen rotundum Opening in the greater wing that transmits the maxillary division of the fifth cranial nerve
Foramen ovale Opening in the greater wing that transmits the mandibular division of the fifth cranial nerve
Foramen lacerum Opening at the junction of the sphenoid, temporal, and occipital bones; transmits a branch of the ascending pharyngeal artery
Foramen spinosum Opening in the greater wing that transmits the middle meningeal artery to supply the meninges
Created by: Jgiron6994