1 Hydrogen is the most abundant element in the universe. 2  Hydrogen isn't common in a pure form on Earth, but is mostly found as part of water. 3  Hydrogen is the main fuel of stars and the only fuel for red dwarfs. 4  The whole universe is thought to have been formed by a Hydrogen nucleus.
Noun. 1. hindlimb-a posterior appendage such as a leg or the homologous structure in other animals. hind limb. hind leg-the back limb of a quadruped. limb-one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper. 1  Facebook.
The hindbrain is composed of two subregions called the metencephalon and myelencephalon. Several cranial nerves are located in this brain region. The trigeminal, abducent, facial, and vestibulocochlear nerves are found in the metencephalon. The glossopharyngeal, vagus, accessory, and hypoglossal nerves are located in the myelencephalon. The fourth cerebral ventricle also extends through this region of the brain. The hindbrain assists in the regulation of autonomic functions, maintaining balance and equilibrium, movement coordination, and the relay of sensory information.