Antrum
Encyclopedia
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 mean for example:
In invertebrates, it may mean for example:
Biology
Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines...
, 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 mean for example:
- antrum cardiacum, a dilation that occurs in the esophagus near the stomach (forestomach)
- antrum follicularum, the cavity in the epithelium that envelops the oocyte
- mastoid antrumMastoid antrumThe mastoid antrum is a cavity 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 .-External links: - "Illustration of the continuity of the...
, a cavity between the middle ear and temporal bone in the skull - pyloric antrumPyloric antrumPyloric antrum is the initial portion of the pyloric part of the stomach. It is near the bottom of the stomach, proximal to the pyloric sphincter, which separates the stomach and the duodenum....
, the initial portion of the pyloric part of the stomach. This is what usually is referred to in terms of "antrum" in stomach related topics. - maxillary antrum or Antrum of Highmore, the maxillary sinusMaxillary sinusThe pyramid shaped maxillary sinus is the largest of the paranasal sinuses, and drains into the nose. It is present at birth as rudimentary air cells, and develops throughout childhood.-General characteristics:...
, a cavity in the maxilla and the largest of the paranasal sinuses
In invertebrates, it may mean for example:
- antrum of female lepidoptera genitaliaLepidoptera genitaliaThe study of the genitalia of Lepidoptera is important for Lepidoptera taxonomy in addition to development, anatomy and natural history. The genitalia are complex and provide the basis for species discrimination in most families and also in family identification. The genitalia are attached onto the...