Skull

Question 1

What are the 2 parts into which the skull can be divided?

Answer 1

1. Neurocranium/cranium: upper part, bowl-shaped, contains brain
2. Facial skeleton/ viscerocranium: lower part

Question 2

What are the 2 parts into which the cranium (neurocranium) can be divided?

Answer 2

cranial vault + cranial base

Question 3

How many bones does the neurocranium consist of and how many are paired/single?

Answer 3

8 bones (only 2 paired; other 6 single)

Question 4

How many bones does the viscerocranium consist of and how many are paired/single?

Answer 4

14 bones; only 2 single (12 paired)

Question 5

What are 4 key types of cavity within the skull and what are their functions?

Answer 5

1. Cranial cavity: houes, supports and protects brain
2. Nasal cavity: respiration and olfaction
3. Orbits: contain eyes and adnexa
4. Oral cavity: start of GI tract, responsible for mastication and initial food processing; houses taste receptors

Question 6

What are the air-filled spaces within the cranial bones called?

Answer 6

paranasal sinuses

Question 7

Label the 8 bones of the neurocranium on the diagram.

Answer 7

Frontal x1

Parietal x2

Temporal x2

Occipital x1

Ethmoid x1

Sphenoid x1

Question 8

What are the 14 bones of the viscerocranium?

Answer 8

Nasal x2

Lacrimal x2

Zygomatic x2

Maxilla x2

Palatine x2

Conchae x2

Mandible

Vomer

Question 9

Label the 6 pairs + 2 unpaired bones of the viscerocranium (facial bones) on the diagram.

Answer 9

2x lacrimal, 2x zygomatic, 2x inferior nasal conchiae, 2x maxilla, 2x nasal, 2x palatine, vomer, mandible

Question 10

Label the lacrimal bone on the diagram.

Answer 10

Question 11

Where is the palatine bone?

Answer 11