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2.3 Bones in head
Bones and structures located in your head.
Question | Answer |
---|---|
Bones are...? | dense connective tissue composed of mainly calcium and phosphate |
How many bones are in the body? | 206 |
List the functions of bones: (6 in total) | Protection, support, surfaces for muscle/ligament/tendon attachment, movement, production of RBCs, and the storage of 99% of the calcium in the body. |
Axial skeleton includes: | 80 bones from the head and torso (including the 6 from the middle ear) |
Appendicular skeleton includes: | 126 bones from the body's extremities. |
The skull contains: | 28 bones |
Mandible | only moveable bone of the skull |
Sutures | Immobile joints that hold the skull together |
Coronal suture holds together what? | divides and holds together the frontal bone from the parietal bone. |
Lambdoid suture holds together what? | holds the parietal bones to the occipital bone. |
Sinuses | air-filled spaces within the skull that decrease the weight of bones, moisten incoming air, and resonate voice. |
What is the foramen magnum? | large opening at the base of the skull that lets the spinal cord through. |
What do the maxillary bones form? | upper jaw, the nose, the orbits (eye sockets), the roof of the mouth, and the maxillary sinuses. |
The zygomatic is also know as the? | cheek bones |
The nasal bones form the? | upper part of the nose. |
The mandible forms the? | lower jaw. |
At what age does the anterior fontanel close? | 10-18 months |
At what age does the posterior fontanel close? | by the age of 2 months |