In the human digestive system, food enters the mouth and mechanical digestion of the food starts by the action of mastication (chewing), a form of mechanical digestion, and the wetting contact of saliva. Saliva, a liquid secreted by the salivary glands, contains salivary amylase, an enzyme which starts the digestion of starch in the food; the saliva also contains mucus, which lubricates the food, and hydrogen carbonate, which provides the ideal conditions of pH (alkaline) for amylase to work. After undergoing mastication and starch digestion, the food will be in the form of a small, round slurry mass called a bolus. It will then travel down the esophagus and into the stomach by the action of peristalsis. Gastric juice in the stomach starts protein digestion. Gastric juice mainly contains hydrochloric acid and pepsin. In infants and toddlers gastric juice also contains rennin. As the first two chemicals may damage the stomach wall, mucus is secreted by the stomach, providing a slimy layer that acts as a shield against the damaging effects of the chemicals. At the same time protein digestion is occurring, mechanical mixing occurs by peristalsis, which is waves of muscular contractions that move along the stomach wall. This allows the mass of food to further mix with the digestive enzymes.
Coloring Page Communities: Some websites offer very basic coloring pages for kids that can be printed off and colored. Others create interactive coloring pages that require children to work on the computer itself to color the images. Unlike the basic websites, the interactive coloring pages are often found on more complex websites that act as a full-fledged community. The coloring pages are only one of many things available to do on a particular site.
Results. Butterflies come in a variety of shapes and sizes, and Butterfly Coloring Pages provide a means to inspire children to expand their creative talents. Butterflies are easily colored, and there are unlimited combinations of colors that many young children can use on these stunning creatures.
Coloring Page Communities – Some websites offer very basic coloring pages for kids that can be printed off and colored. Others create interactive coloring pages that require children to work on the computer itself to color the images. Unlike the basic websites, the interactive coloring pages are often found on more complex websites that act as a full-fledged community. The coloring pages are only one of many things available to do on a particular site. On TheDollPalace.com, for example, dolls of every shape and size are available for children to play with and create, and then favorites are created into coloring pages. When dolls and coloring pages are complete, there are still interesting articles to read, personalities about the dolls to create, contests to take part in, and even forums and chats to visit to get to know other doll and coloring enthusiasts.
Coloring pages have been around for many years, but with the ever-evolving technology that we are all so in awe of, it is the high-tech games and toys that generally catch the attention of parents, while the advantages that coloring pages have to offer very young or even elementary age children, are ignored. It would be quite beneficial for parents to understand that coloring pages provide a great number of learning opportunities for their children, and these lessons are conveyed in a fundamental way that children can grasp. And this incredible opportunity is available at no cost to you, as these pages can be freely printed from a number of online sites. So now you needn’t worry about the cost of the latest expensive educational gadget, as you only need to supply the ink for your printer and you will be able to take advantage of all that coloring pages provide for your child.