Information about Secondary Palate
The secondary palate is an anatomical structure that divides the nasal cavity from the oral cavity in many vertebrates.
In human embryology, it refers to that portion of the hard palate that is formed by the growth of the two palatine shelves medially and their mutual fusion in the midline. It forms the majority of the adult palate and meets the primary palate at the incisive foramen. Secondary palate development begins in the sixth week of pregnancy and can lead to cleft palate when it goes awry.
There are three major mechanisms known to cause this failure:
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In human embryology, it refers to that portion of the hard palate that is formed by the growth of the two palatine shelves medially and their mutual fusion in the midline. It forms the majority of the adult palate and meets the primary palate at the incisive foramen. Secondary palate development begins in the sixth week of pregnancy and can lead to cleft palate when it goes awry.
There are three major mechanisms known to cause this failure:
- Growth retardation - Palatal shelves do not grow enough to meet each other.
- Mechanical obstruction - Improper mouth size, or abnormal anatomical structures in the embryonic mouth prevent fully grown shelves from meeting each other.
- Midline epithelial dysfunction (MED)[1] - The surface mucosa of embryonic shelves is impaired, which causes a failure of palatal fusion.
References
1. ^ Dudas et al. (2007): Palatal fusion – Where do the midline cells go? A review on cleft palate, a major human birth defect. Acta Histochemica, Volume 109, Issue 1, 1 March 2007, Pages 1-14
The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face.
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Function
The nasal cavity conditions the air to be received by the areas of the respiratory tract...... Click the link for more information.
mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water.
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Location
In all mammals, the mouth is forward-facing in the face. Non-mammals have mouths in other locations (e.g...... Click the link for more information.
Vertebrata
Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Embryology is the study of the development of an embryo. An embryo is defined as any vertebrate in a stage before birth or hatching. Embryology refers to the development of the egg cell (zygote) after fertilization and the differentiation of cells into tissues and organs.
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The hard palate is a thin horizontal bony plate of the skull, located in the roof of the mouth. It spans the arch formed by the upper teeth.
It is formed by the palatine process of the maxilla and horizontal plate of palatine bone.
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It is formed by the palatine process of the maxilla and horizontal plate of palatine bone.
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The development of the secondary palate commences in the sixth week of human embryological development. It is characterised by the formation of two palatal shelves on the maxillary prominences, the elevation of these shelves to a horizontal position, and then a process of palatal
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Pregnancy is the carrying of one or more offspring, known as a fetus or embryo, inside the body of a female mammal such as a human. In a pregnancy, there can be multiple gestations (for example, in the case of twins or triplets).
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Cleft lip and cleft palate, which can also occur together as cleft lip and palate are variations of a type of clefting congenital deformity caused by abnormal facial development during gestation. This type of deformity is sometimes referred to as a cleft.
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