Skeletomuscular System Flashcards
“Form follows function”
Skeletomuscular System
Longer than they are wide
Long bones
Similar to small cubes
Short bone
Very thin in one dimension
Flat bones
Have odd shapes
Irregular bones
Form inside tendons
Sesamoid bones
Embedded in the structures between the main skull bones
Wormian bones
Axial skeleton: the central axis of the body
- 8 Cranial bones
- 14 Facial bones
- Hyoid bone
- Ribs
- Vertebrae
The appendages (arms, legs, hands, feet) and girdles (holding the appendages to the central axis)
Appendicular skeleton
Give an example of Appendicular skeleton
- Pectoral girdle
- Upper appendages (arms and hands)
- Pelvic girdle
- Lower appendages (legs and feet)
Location: Forehead
Is originally two bones that fuse so tightly by age 8 that the suture is usually not visible.
Frontal bone
Location: Sides of the skull above the ears
Means wall, and these form the walls of the cranial cavity.
Parietal bone
Location: The temples holding the ears
The only joint in the skull is associated with this bone. The mandible articulates with the temporals.
Temporal bone
Location: Entire back of the skull
The spinal cord extends through the skull at the foramen magnum of this bone.
Occipital Bone
Location: Forms the floor of the cranium above the nasal passages
Includes the cribriform plate, a sieve-like structure that allows olfactory neurons to extend into the nose.
Ethmoid
Location: Forms the floor of the cranium
This bone touches all other bones of the cranium.
Sphenoid
Location: Paired bones that form the front of the mouth
The upper teeth are formed within these bones.
Maxillae
Location: Paired bones that form the roof of the mouth
If development is arrested, a cleft palate results.
Palatine Bone
Location: Paired bones that form the bridge of the nose
These thin slivers of bone can penetrate the ethmoid if struck hard enough.
Nasal bone
Location: Paired bones on either side of the nose
Tears are collected and pass through a small hole in this bone to the nasal cavity.
Lacrimal bone
Location: Cheek bones
These bones protect the eyes. If they are hit, black eyes result.
Zygomatic bone
Location: Paired bones deep within the nasal passages
The conchae provide surface area to warm and moisten air.
Inferior Nasal conchae
Location: Single bone that divides the nasal cavity
This bone supports the cartilage of the nasal septum; damage can result in a deviated septum.
Vomer
Location: Jaw bone
This is the only moveable joint in the skull; the lower teeth are formed within this bone.
Mandible
