Speech Difficulties in Down Syndrome. Down syndrome (DS) is an incurable genetic disorder that has a profound impact upon a personâs physical, mental, and social development. Children with DS have anatomical and physiological differences in the mouth and throat region that affect feeding, swallowing, and oral motor skills.
1 A gross refers to a group of 144 items (a dozen dozen or a square dozen).  A great gross refers to a group of 1728 items (a dozen gross or a cubic dozen).
A square is a rectangle in which all four sides are equal length and create four ninety degree angles. A circle is a round shape that has no sides or corners. A parallelogram has four sides, four vertices, and two parallel sides. A quadrilateral has four sides, four vertices, and two diagonals.