Axial Skeleton Flashcards
Functions of the Skeletal System?
Support movement, protect internal organs from trauma, assistance in movement, mineral homeostasis, erythrocyte production, triglyceride storage
What are the 6 categories of bone classification?
- Long Bones 2. Short Bones 3. Flat Bones 4. Sesamoid 5. Irregular 6. Sutural
Define long bones
Longer than they are wide ex: humerus
Define short bones
Almost equal in length and width (cube like) ex: Trapezoid, wrist bone
Define flat bones
Relatively flat but may be curved ex: sternum
Define sesamoid bones
Develop where there is friction, tension, and stress ex: Patella These bones are different in shape for everyone because everyone gets impacted differently
Define Irregular bones
complex shape ex: vertebra
Define sutural bones
Located between some cranial bones found in sutures (formed between structures)
What bones make up the axial skeleton?
-80 bones along the axis of the body - Its bones support and protect organs of the head, neck, and torso
What bones make up the appendicular skeleton?
- 126 bones make up the upper and lower limbs, and bones of girdles
Depressions and Openings
Sites allowing the passage of soft tissue (nerves, blood vessels, ligaments, tendons) or formation of joints
Types of depressions and openings
Fissure Foramen Fossa Sulcus Meatus
Fissure
Narrow slit Ex: superior orbital fissure of sphenoid bone
Foramen
Hole Ex: optic foramen of sphenoid bone
Fossa
Pit, indentation, scoop ex: coronoid fossa of humerus
