Dictionary > Petrotympanic fissure

Petrotympanic fissure

Definition
noun
A narrow transverse slit dividing the mandibular fossa of the temporal bone into tympanic and petrous portions.
Supplement
The contents of the fissure include communications of cranial nerves VII and IX to the infratemporal fossa.
Word origin:
Synonyms:

  • glaserian fissure
  • fissura petrotympanica


You will also like...

Salmon jumping upstream in the river
Lotic Communities & Animals

A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

Kidneys
Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

Early Mammals on Earth
Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

mRNA
Protein Synthesis

Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

Cell structure
Cell Structure

A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..

Related Articles...

No related articles found

See all Related Topics