Cranial
Basic Anatomy
Bone Biology
skeletal Growth
Mystery
100

What are the three sutures and their relative positions?

- Saggital Suture- straight down the middle

- Coronal- across the frontal bone, like a headband

-Lamboidal- across the occipital bone

100

What are the different types of bones?

long bones, short bones, flat bones, irregular bones

100

What percent of the bone is organic and what percent is inorganic?

30% organic, 70% inorganic

100

Undifferentiated cells that give rise to connective tissue

What is mesenchyme

100

When two bones completely fuse together?

synostoses 

200

What are the ways to identify the occipital bone?

The foramen magnum

thicker than other cranial vault bones

variation in external protuberence

no meningeal grooves

200

What are the four parts of a bone?

Epiphysis, diaphysis, metaphysics, apophysis 

200

What are the different types of bone tissue?

Cortical, cancellous, subchondral, periosteum, endosteum

200

Directs outgrowth of limb bud and development of the bone primordial by influencing the progress zone

What is the Apical ectodermal ridge

200

What is the difference between adduction and abduction?

adduction- moving limb towards midline of the body

abduction- moving limb away from midline of the body

300

what are the three auditory ossicles, and what is their shape?

Malleus- mallet

Stapes- triangle

Incus- backwards florida

300

What are the types of joints?

Fibrous, cartilaginous, synovial

300

What is an osteon?

basic unit of adult compact bone

arranged in concentric tubes around a pair of blood vessels

connected through Haversian canal system

300

Undifferentiated mesenchyme that is immediately next to the AER

Progress zone

300

What is an osteoclast?

Bone resorption cells

helps free apatite crystals and collagen from bone

400

Tips to identify the temporal bone

external auditory meatus is lateral

squama extends superiorly 

meningeal grooves on endocranial surface

zygomatic process extends anteriorly

mastoid process is posterior

400

What are the EIGHT different types of movement?

flexion, extension, adduction, abduction, supination, pronation, dorsiflexion, plantar flexion

400

What is the Haversian canal System?

Network of vascular canals that supplies nerves and blood vessels to bone, longitudinal orientation and pass through an osteon

400

What week and stage do homogenous interzones form?

Week 7 and stage 18

400

The bone that is surrounded by and formed in tendon

What are sesamoid bones

500

What are the four different angles on the parietal bones

mastoid angle

frontal angle

sphenoid angle

occipital angle

500

What is the difference between medial and proximal, lateral and distal?

Medial- towards midline of the body

proximal- nearest the articulation with the axial skeleton

lateral- away from midline

distal- farthest from the articulation with the axial skeleton

500

Bone maintenance cells

helps maintain calcium homeostasis

formed from trapped osteoblasts

Whats is an osteocyte

500

What type of ossification occurs when mesenchyme is covered directly into bone

Intramembranous ossification 

500

A type of fibrous joint such as a tooth into the alveolus that is immoveable

gomphosis