Editing Tetrapod (section)

===Skull===
The brain only filled half of the skull in the early tetrapods. The rest was filled with fatty tissue or fluid, which gave the brain space for growth as they adapted to a life on land.<ref>[https://www.discovermagazine.com/the-sciences/the-rise-of-the-tetrapods-how-our-early-ancestors-left-water-to-walk-on-land The Rise of the Tetrapods: How Our Early Ancestors Left Water to Walk on Land]</ref> The [[palate|palatal]] and jaw structures of tetramorphs were similar to those of early tetrapods, and their [[dentition]] was similar too, with labyrinthine teeth fitting in a pit-and-tooth arrangement on the palate. A major difference between early tetrapodomorph fishes and early tetrapods was in the relative development of the front and back [[skull]] portions; the snout is much less developed than in most early tetrapods and the post-orbital skull is exceptionally longer than an amphibian's. A notable characteristic that make a tetrapod's skull different from a fish's are the relative frontal and rear portion lengths. The fish had a long rear portion while the front was short; the [[orbit (anatomy)|orbital vacuities]] were thus located towards the anterior end. In the tetrapod, the front of the skull lengthened, positioning the orbits farther back on the skull.