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.
Brain sagittal section stem highlighted. The hind brain is also called the rhombencephalon and is the brain stem that provides the connection between the spinal cord and the rest of the brain.he medulla oblongata can be found within the myelencephalon region of the hind-brain. Nuclei in the medulla oblongata control the level of heart activity including rate and contractility. The medulla oblongata also controls other related functions including blood pressure and distribution of blood to different organs.