What is a short channel or passageway in bone?

What is a short channel or passageway in bone?

meatus (bone hole) a short channel or passageway, such as the channel in the temporal bone of the skull that leads to the inner ear. axial skeleton.

What bone marking is the passageway for the optic nerve?

The apex of the orbit is the optic foramen (canal), bound medially by the body of the sphenoid bone and laterally by the lesser wing of the sphenoid bone. It is medial to the superior orbital fissure. The optic foramen provides passage for the optic nerve (CN II) and ophthalmic artery to exit the skull.

What is a foramen quizlet?

foramen. an opening through a bone that usually serves as a passageway for blood vessels, nerves, or ligaments. foramen (example) foramen magnum of the occipital bone. fossa.

Is tubercle and tuberosity the same?

The muscles attach by tendons, where the enthesis is the connective tissue between the tendon and bone. A tuberosity is generally a larger tubercle.

Which term refers to a small opening in the bone?

The following terms are used to describe cavities that connect to other areas: A foramen is any opening, particularly referring to those in bone. Foramina inside the body of humans and other animals typically allow muscles, nerves, arteries, veins, or other structures to connect one part of the body with another.

Is optic foramen the same as canal?

The optic foramen is the opening to the optic canal. The canal is located in the sphenoid bone; it is bounded medially by the body of the sphenoid and laterally by the lesser wing of the sphenoid. Compared to the optic nerve, the ophthalmic artery is located inferolaterally within the canal.

What is optic canal?

The optic canal is a funnel-like structure as part of the sphenoid bone that extends from the optic foramen to the orbital apex, the posterior-most end of the orbit. The orbital apex consists of the optic canal and the superior orbital fissure.

What is a foramen and meatus?

In context|anatomy|lang=en terms the difference between foramen and meatus. is that foramen is (anatomy) an opening, an orifice; a short passage while meatus is (anatomy) a tubular opening or passage in the body.

When does a vessel not cross a narrow channel?

A vessel shall not cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within such channel or fairway. – The latter vessel may use the sound signals prescribed in rule 34 (d) if in doubt as to the intention of the crossing vessel.

How are the terms narrow channel and Fairway defined?

Two terms are used throughout the Rule that are not defined. They are “narrow channel” (namesake of the Rule) and “ (narrow) fairway.” We must assume that the drafters of the Rules either believed their meanings to be obvious or else were not able to formulate suitable concise definitions.

When to sound the signal in narrow channels?

The vessel nearing a bend or an area of a narrow channel or fairway where other vessels may be obscured by an intervening obstruction shall navigate with particular alertness and caution and shall sound the appropriate signal prescribed in rule 34 e.

What is the difference between a strait and a channel?

Nautical channels. In a larger nautical context, as a geographical place name, the term channel is another word for strait, which is defined as a relatively narrow body of water that connects two larger bodies of water. In this nautical context, the terms strait, channel, sound, and passage are synonymous and usually interchangeable.