Like in a greenhouse, greenhouse gasses let radiation from the sun reach Earth (the 'inside' of the greenhouse) but won't let the Earth reflect radiation. This is exactly what â¦ greenhouses do. Through the glass walls, the sunlight can come in, but once the rays are inside, the heat is trapped.
The sternohyoid muscle's main function is the depression of the hyoid bone. The hyoid bone is located below the mandible, or lower jaw, and is a U shaped bone that is partially responsible for tongue movement and the action of swallowing. The sternohyoid is one of a pair of muscles responsible for this action.
The muscle starts at the styloid process, a pointed part of the skull's temporal bone, which lies just below the ear and functions as an anchor point for a number of muscles. The stylohyoid is located just in front of the digastric muscle, which lifts the tongue back when swallowing. It is perforated (run through) by a facial tendon â the digastric tendon â before it slots into the hyoid bone. The stylohyoid muscle is given instructions by the facial nerve.