7. The Skeletal System

Examine the structure of the skull, and predict its likely functions based on its form.

A deviated septum results when the nasal septum is shifted to one side or the other. What bones might be involved in this condition? Why might this make breathing difficult?

Some health practitioners claim that the cranial bones are moveable and that they are able to move these bones to treat a variety of conditions. Is this likely to be true in an adult? Why or why not?

Bones that articulate with the sphenoid include which of the following?

a. Parietal

b. Frontal

c. Occipital

d. Zygomatic

e. Ethmoid

Name two ways in which the fetal skull differs from the adult skull. A certain short-day plant flowers only when days are less than 12 hours long. Which of the following would cause it to flower?

a. A 9-hour night and 15-hour day with 1 minute of darkness after 7 hours

b. An 8-hour day and 16-hour night with a flash of white light after 8 hours

c. A 13-hour night and 11-hour day with 1 minute of darkness after 6 hours

d. A 12-hour day and 12-hour night with a flash of red light after 6 hours

Name the eight bones of the cranium.

What facial bone forms the chin? The cheekbone? The upper jaw? The bony eyebrow ridges?

Identify the cranial and facial bones in the diagram below.

a. ___

b. ___

c. ___

d. ___

e. ___

f. ___

g. ___

h. ___

i. ___

j. ___

k. ___

l. ___

The unpaired facial bones include the:

(a) Lacrimal and nasal

(b) Vomer and mandible

(c) Maxilla and mandible

(d) Zygomatic and palatine

The boundaries between skull bones are immovable joints called:

(a) Foramina

(b) Fontanelles

(c) Lacunae

(d) Sutures

The joint between the frontal and parietal bones is correctly called the ____ suture.

(a) Parietal

(b) Lambdoid

(c) Squamous

(d) Coronal

Blood vessels that drain blood from the head pass through the:

(a) Jugular foramina

(b) Hypoglossal canals

(c) Stylomastoid foramina

(d) Mental foramina

(e) Lateral canals

Which eight bones make up the cranium?

What seven bones constitute the orbital complex?