A&P Chapter 7 Flashcards
How many bones are in the body?
206
What bones are included in the axial skeleton?
The bones of the skull, vertebral column, and rib cage
How many bones are in the axial skeleton?
80
What bones are included in the appendicular skeleton?
The bones of the upper/lower limbs, shoulder, and hip girdle
How many bones are in the appendicular skeleton?
126
What is the most complex bony structure in the body?
The skull
What are the two sets of bones that the skull is formed of?
Cranial and facial bones
What do the cranial bones do for the skull?
Encloses the brain in the cranial cavity and provides the sites of attachment for head and neck muscles
What do the facial bones do for the skull?
Form framework of the face, contains cavities for special sense organs for sight/taste/smell, provides openings for air and food passage, secures teeth, and anchors facial muscles used for facial expression
Most skull bones are flat and firmly locked together, except for what skull bone?
Mandible
Joints in the skull are called _______
Sutures
What is the appearance of sutures?
Serrated, saw tooth appearance
What eight bones is the cranium composed of?
Frontal bone, parietal bone (2), occipital bone, temporal bones (2), sphenoid bone, and ethmoid bone
What are the skull bones to know for this chapter?
Frontal bone, parietal bone, temporal bone, sphenoid bone, ethmoid bone, lacrimal bone, nasal bone, zygomatic bone, maxilla, vomer, inferior nasal concha, sutural bone, and the mandible
The infant skull has ____ bones than the adult skull
More
How are skull bones connected in the infant skull?
Fontanelles
What are fontanelles?
Unossified remnants of fibrous membranes, that allows passage through the birth canal and allows brain growth
What are the four fontanelles?
Anterior, posterior, mastoid, and sphenoidal
Of the four fontanelles, which is the last to close?
Anterior fontanelle
Which tissue type are fontanelles made of?
Dense regular connective tissue
When do fontanelles usually close completely?
The first 2 years
How many bones are in the facial skeleton?
14
How many bones in the facial skeleton are paired?
12
Which bones in the facial skeleton are single?
Mandible and vomer