Questions and Answers
Which bone forms the floor of the orbit?
Maxilla
What structure is located posteromedially at the optic foramen?
Orbital fat
What covers the sclera of the eye?
Conjunctiva
Which bone forms the medial wall of the orbit?
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What structure is located in the fossa for the lacrimal sac?
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Which type of articulation permits little movement?
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What type of tissue joins the bones in fibrous synarthroses?
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What is an example of cartilaginous synarthroses?
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Which type of movement is permitted in diarthroses?
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What happens in bony fusion articulation?
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Study Notes
Orbital Structure
- The floor of the orbit is formed by the maxilla bone.
- The optic foramen is located posteromedially and contains the optic nerve and ophthalmic artery.
Orbital Walls
- The medial wall of the orbit is formed by the lacrimal bone and the frontal process of the maxilla bone.
Eye Components
- The sclera of the eye is covered by the conjunctiva.
Lacrimal System
- The fossa for the lacrimal sac is located in the medial wall of the orbit and contains the lacrimal sac.
Joint Types
- Synarthroses are joints that permit little movement.
- Fibrous synarthroses are joints where the bones are joined by fibrous tissue.
- An example of cartilaginous synarthroses is the joint between the ribs and the sternum.
- Diarthroses are joints that permit a wide range of movement.
- Bony fusion articulation is a type of joint where the bones are fused together, resulting in the loss of movement.
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