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What is the petrous part?

What is the petrous part?

The petrous part of the temporal bone (or more simply petrous temporal bone, PTB) forms the part of skull base between the sphenoid and occipital bones.

Where is the petrous portion?

The petrous face is located in the skull base between the sphenoid and occipital bones. It consists of a base that joins the mastoid laterally and an apex that extends anteromedially to form the foramen lacerum. The anatomy can be divided into three surfaces: anterior/superior, posterior, and inferior.

What does the petrous part of the temporal bone contain?

The petrous part is pyramidal shaped, and lies at the base of temporal bone. It contains the inner ear.

Which canal pass through the pyramid of temporal bone?

carotid canal
The carotid canal is a passageway through which the internal carotid artery passes through the petrous part of the temporal bone to emerge in the middle cranial fossa.

What is the function of petrous part?

It transmits the facial and acoustic nerves and the internal auditory branch of the basilar artery. The lateral end of the canal is closed by a vertical plate, which is divided by a horizontal crest, the falciform crest, into two unequal portions.

What is the most dense bone in the body?

petrous bone
Petrous comes from the Latin word ‘petrosus’, which means ‘stone-like, hard’. Its name says it all: due to its responsibility to protect the inner part of the ear, the petrous bone is one of the densest bones in the human body.

Is the nasal bone part of the skull?

The facial bones of the skull form the upper and lower jaws, the nose, nasal cavity and nasal septum, and the orbit. The facial bones include 14 bones, with six paired bones and two unpaired bones. The paired bones are the maxilla, palatine, zygomatic, nasal, lacrimal, and inferior nasal conchae bones.

Which is the hardest part in human body?

Tooth enamel
Tooth enamel is the first line of defense your teeth have against plaque and cavities. It is the white, visible part of the tooth and it is also the hardest part of the human body.

What is the purpose of your temples?

The temple is a juncture where four skull bones fuse together: the frontal, parietal, temporal, and sphenoid. It is located on the side of the head behind the eye between the forehead and the ear. The temporal muscle covers this area and is used during mastication.

Why is it called the temporal bone?

Etymology. Its exact etymology is unknown. It is thought to be from the Old French temporal meaning “earthly,” which is directly from the Latin tempus meaning “time, proper time or season.” Temporal bones are situated on the sides of the skull, where grey hairs usually appear early on.