there´s no any "hypoglossal muscle"!
do you mean HYOglossal muscle?
The hyoid is a small curved bone that does not attach to any other bone in the body and is connected to the tongue.
depresses hyoid bone and fixes hyoid bone during opening of mouth
The sternohyoid muscle runs from the sternum to the hyoid bone in the neck. It depresses the hyoid bone with the larynx.
pizza
I believe you are talking about the hyoid bone. It's the only bone in the body not directly connected to another bone. It is instead attached to ligaments and muscles.
Tendons attach muscle to bone, muscles do not attach to bone.
Superior belly of omohyoid muscle
Tendons attach muscle to bone (whereas ligaments attach bone to bone).
The action of the omohyoid is to depress the hyoid. Its name derives from the Greek "omos" meaning shoulder, giving one of its attachments, and "hyoid", giving the other attachment - the hyoid bone. The function of the hyoid seems to be in voice variations. All mammals have them and there are arguments if primitive hominids used them as we do.
The sternohyoid muscle, Omohyoid muscle, and Thyroid muscle are three muscles that are responsible for the depression of the hyoid bone.
There is no bonw in the tongue. The tongue is pure muscle
No it doesn't. It is the only bone in the body that doesn't attach to another bone.