Antrum
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Antrum

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:


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

Antrum
 



 



 
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