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.
1 Lower incisors are usually the first teeth to erupt at about 6 months. 2  All 20 primary teeth are usually in the mouth by about 2 years. 3  There are 32 permanent teeth including 4 wisdom teeth. 4  The first permanent teeth to erupt (usually at about 6 years) are the 4 first permanent molars behind the last primary teeth.he molars are the largest of the teeth. They have a large flat biting surface. The function of the molars is to chew, crush and grind food. There are eight molars in the primary dentition and twelve in the permanent dentition.