Cleft and Voice Essay Example | Topics and Well Written Essays - 3000 words

Cleft and Voice - Essay Example Primarily, the congenital defect called cleft lip takes place during the developmental stage of the human embryo which begins at about thirty five (35) days from the first day of fertilization (Seeley, Stephens, and Tate 2005; Iozzio 2005). The human embryonic face initially gains form from the union of ectodermic cells which forms ectodermic tissues. Five (5) bunches of these tissues are normally formed. Out of these, a first bunch of ectodermic tissues shapes the forehead where two groups of protrusions on each side shape the nose, while the tissues in between makes up the center of the upper lip and the jaw (Seeley, Stephens, and Tate 2005). The next two bunches of ectodermic tissues shapes the upper lip and the upper jaw or the maxillae, while the last two bunches shapes the lower lip and the lower jaw or the mandible (Seeley, Stephens, and Tate 2005). Normally, the facial tissues initially grow and develop with the multiplication of cells as well as development and growth of connective tissues cells increasing the size of the nose and subsequently uniting at the junction where the tissues meet called the midline or the nasal septum shaping the upper jaw and lip (Seeley, Stephens, and Tate 2005). In congenital abnormality, the connective tissues fail to join the nose tissues resulting to cleft lip. However, if normal growth and development of the upper jaw and lip will ensue, the palate will begin to be shaped forming the roof of the oral cavity uniting again at the midline within about fifty six (56) days of embryonic development (Seeley, Stephens, and Tate 2005). Nevertheless, in cases where genetic dictates does not produce connective tissues for the purpose of joining the developing mouth roof, then, cleft palate would result. On the other hand, the other parts of the mesoderm and ectoderm layers of the developing embryo also develop into the other upper respiratory system parts such as the nasopharynx, oropharynx, and the