Deciduous teeth first teeth seen in the mouth are the mandibular centrals and the last are the maxillary second molars. The primary teeth are made up of central incisors, lateral incisors, canines, first molars, and secondary molars; there is one in each quadrant, making a total of four of each tooth. All of these are gradually replaced with a permanent counterpart except for the primary first and second molars; they are replaced by premolars. The replacement of primary teeth begins around age six, when the permanent teeth start to appear in the mouth, resulting in mixed dentition. The erupting permanent teeth cause
Atlantic semi-deciduous forests Atlantic semi-deciduous forests The Atlantic semi-deciduous forests, also known as the Atlantic interior forests, are a belt of tropical moist broadleaf forests that are part of the Atlantic Forests complex of eastern Brazil. The semi-deciduous forests form a transitional zone between the humid Atlantic moist forests which lie near the Atlantic coast, and the drier Caatinga shrublands, Atlantic dry forests, and Cerrado savannas of the interior. The World Wildlife Fund divides the semi-deciduous forests into three distinct ecoregions. The Pernambuco interior forests lie west of the Pernambuco coastal forests in Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, and Sergipe states.