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What (who) is Antrum - definition
WIKIMEDIA DISAMBIGUATION PAGE
Antral
Antrum
·noun A cavern or cavity, ·esp. an anatomical cavity or sinus.
antrum
['antr?m]
¦ noun (plural antra -tr?) Anatomy
1. a natural chamber or cavity in a bone.
2. the pyloric end of the stomach.
Derivatives
antral adjective
Origin
C19: from L., from Gk antron 'cave'.
Mastoid antrum
![Left [[temporal bone]] showing surface markings for the tympanic antrum (red), transverse sinus (blue), and [[facial nerve]] (yellow).](https://commons.wikimedia.org/wiki/Special:FilePath/Gray1209.png?width=200 "Left [[temporal bone]] showing surface markings for the tympanic antrum (red), transverse sinus (blue), and [[facial nerve]] (yellow).")
AIR SPACE IN THE PETROUS PORTION OF THE TEMPORAL BONE
Tympanic antrum; Antrum mastoideum; Valsalva's antrum
The mastoid antrum (tympanic antrum, antrum mastoideum, Valsalva's antrum) is an air space in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum (entrance to the mastoid antrum). These air spaces function as sound receptors, provide voice resonance, act as acoustic insulation and dissipation, provide protection from physical damage and reduce the mass of the cranium.
Wikipedia
Antrum
This is a disambiguation page for the biological term. For the 2018 horror movie, see Antrum (film)
In biology, antrum is a general term for a cavity or chamber, which may have specific meaning in reference to certain organs or sites in the body.
In vertebrates, it may refer specifically to:
- Antrum follicularum, the cavity in the epithelium that envelops the oocyte
- Mastoid antrum, a cavity between the middle ear and temporal bone in the skull
- Stomach antrum, either
- Pyloric antrum, the lower portion of the stomach. This is what is usually referred to as "antrum" in stomach-related topics
- or Antrum cardiacum, a dilation that occurs in the esophagus near the stomach (forestomach)
- Maxillary antrum or antrum of Highmore, the maxillary sinus, a cavity in the maxilla and the largest of the paranasal sinuses
In invertebrates, it may refer specifically to:
- Antrum of female lepidoptera genitalia
