Oral Cavity Primary

Primary oral cavity

The primary oral cavity is a narrow slit at the head end of the embryo, which is limited by five processes of the gill arches. It is the first part of the digestive tract in the embryo and serves for nutrition and respiration.

The primary oral cavity is formed at 2-3 weeks of embryonic development. At this time, the embryo begins to feed, and for this it needs to have a specialized organ - the oral cavity.

The formation of the primary oral cavity begins with the formation of two symmetrical slits between the germ layers. These slits are called blastopores. They are limited by five processes that are part of the gill arches: an unpaired frontal process and two paired ones - the maxillary and mandibular.

During development, the primary oral fissure gradually widens, and at 6-7 weeks it turns into a full-fledged oral cavity, in which teeth and other organs form.

During normal development of the embryo, the primary oral cavity plays an important role in nutrition and respiration. However, if its formation is disrupted, this can lead to various diseases. For example, in the absence of a primary oral fissure, the fetus may develop primary oral fissure syndrome.

The oral cavity of the primary is a narrow gap at the cephalic end of the embryo limited by 5 processes; branchial arches, unpaired frontal and paired maxillary and mandibular

The oral cavity is a small oral segment that is the entrance to the digestive tract in all vertebrates. This