The mandibles of arthropods open side to side. The jaws of humans open up and down.
The mandible, also known as the lower jaw bone, is the only moveable bone in the face. It is unique in that it can move up and down, as well as side to side, enabling actions such as chewing and speaking.
The lateral pterygoid muscle has a triangular shape, with two heads; superior and inferior. It has horizontally orientated muscle fibers, and is the major protractor of the mandible.
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The grinding jaws of a insect are called
The jaw bone or mandible is located in the head, it is the only skull bone that moves. It is fairly simple to judge where it is, below the bottom teeth. To find it put your hand on your chin, that's it, then to find the ramus (at the back) slide your hand round the side at the bottom until you come to a shapr upwards corner, this is the ramus.
The entrance is on the right side of the building on the bottom you have to use the crowbar to open it.
A grasshopper has bilateral symmetry. The left side is essentially a mirror of the right. IT doesn't have any other types of symmetry.
Arkive shows a picture of a male and female grasshopper side-by-side. They are common field grasshoppers, but there are more than 10,000 known species of grasshoppers throughout the world.
The chewing movements of the mandible are primarily produced by the coordinated action of several muscles, including the masseter, temporalis, and pterygoid muscles. These muscles work together to elevate, depress, and move the mandible side to side, allowing for effective grinding and crushing of food. The movements are controlled by the trigeminal nerve (cranial nerve V), which transmits signals between the brain and the muscles involved in mastication. Additionally, the temporomandibular joint (TMJ) facilitates the mobility of the mandible during these movements.
In the viscerocranium (the face part of the skull) the mandible (jaw bone) can be moved up and down ad side to side.
Grab the opening plate on the side from the bottom and lever it upward to break the seal. Then yank the the whole thing to fully open it. Reverse to close.