The structure of the human skull. It is thought out by the nature ...

The human skull is a bone box of a complex configuration for placing the brain and sensitive receptors connected to the brain directly: vision - eyes, hearing - two external sound receivers in combination with the inner middle ear, nose and nose with two canals and a maxillary cavity, taste - Receptors located on the tongue. Information tactile, or tactile, is accepted by the brain indirectly.

Functional separation

The structure of the human skull is rational, like everything in nature. The brain chamber occupies the entire upper part of the skull, and the lower part is intended for the placement of the visceral organs. The cerebral part consists of several single and paired bones, connected by means of seams. This frontal, parietal and occipital bones, paired bones - wedge-shaped and temporal. The visceral part includes the upper jaw, the inferior conch of the nose, the palatine and cheekbones, the lower jaw and the hyoid bone.

Visceral part

In the skull open the entrance to the digestive and respiratory tract. The moving part of the skull, the lower jaw, ends with a yawn that passes into the esophagus and larynx. Thus, the structure of the human skull is oriented to the vital activity of the whole organism. These two receivers of food and air are separated and each performs its function. The skull is based on its base on the spinal column, it is supported by seven cervical vertebrae, they also play the role of frame support for the neck muscles, arteries and veins. A lot of nerves pass through the lower part, each of them communicates its information to the brain, receiving the necessary impulses in response. The rather complex structure of the human skull is justified by a multitude of useful functions.

Codex

The upper part is the so-called arch, the fore part of the arch is the forehead that passes into the superciliary arches, between which is located a depression. On the sides of the cranial vault, the temporal bone, parietal and sphenoid bones are closed. Down from the line of closing of the bones listed begins the skull base. The form of the base is complex, it is distinguished by a large number of tunnels through which nerve fibers and blood vessels go. In the back of the base is the occipital bone. In many respects the structure of the human skull is subject to the tasks of life support.

The front part

The front part of the skull consists of three tiers, different from each other, not connected with each other and performing independent functions. This eye socket is a pair formation in the form of a horizontally located pyramid base outward, apex inside. Bones of the human skull , the structure of internal segments - all carefully thought out and interconnected. In the orbit, there is an eyeball, an iron that produces a tear fluid, and some fatty tissue. Below the eye department is the nasal cavity, located in the center. In the middle, the cavity is divided by a bone septum, and outwardly it opens with a pear-shaped opening. All this can be seen if you look at the structure of the human skull in pictures. Below the nasal cavity is the oral cavity, which is confined to the alveoli and dentition from the sides and the skeletal sky from above. The oral cavity is the most mobile part of the skull, performing a chewing function. In addition, there is a speech apparatus in the oral cavity.