By Mayo Clinic Staff. Hand numbness is usually caused by damage, irritation or compression of one of the nerves or a branch of one of the nerves in your arm and wrist. Diseases affecting the peripheral nerves, such as diabetes, also can cause numbness, although with diabetes similar symptoms usually occur first in your feet.
Itâs also very important to consider how we chew and break down food for proper digestion. The first step of digestion starts in your mouth. Teeth help break down foods and saliva has enzymes by which the digestive process starts. As you swallow food, muscles move it through the digestive tract.Food then is broken down and absorbed of nutrients needed by your body for health and development.eeth help break down foods and saliva has enzymes by which the digestive process starts. As you swallow food, muscles move it through the digestive tract. Food then is broken down and absorbed of nutrients needed by your body for health and development.
By the time a child is 3 years old, he or she has a set of 20 deciduous teeth, 10 in the lower and 10 in the upper jaw. Each jaw has four incisors, two canines, and four molars. The molars' purpose is to grind food, and the incisors and canine teeth are used to bite into and tear food. The primary teeth help the permanent teeth erupt in their normal positions; most of the permanent teeth form close to the roots of the primary teeth.