Crystal. When most people talk about bringing out the crystal, they are often referring to a type of glass that is made from silica, lead oxide, soda or potash, and other additives. Lead crystal is prized for its durability and decorative properties, even if it does not necessarily possess a crystalline structure.
What part of the brain controls breathing and heartbeat? The brain stem controls breathing and heart rate as well as blood pressure and alertness. Found at the top of the spinal column, the brain stem consists of three main parts, including the medulla oblongata, pons and midbrain. The medulla oblongata controls cardiac and respiratory rates.
Very simple motor commands such as reflexes or scratching are controlled by the spinal cord. Other reflexes such as breathing are controlled at the level of the brain stem, located at the base of your brain. Various regions in the brain stem also control posture. Our cerebral cortex controls the most complicated motor tasks, including goal-directed behavior.