Among the human sensory organs, the earliest development is touch. Infants and young children can get emotional satisfaction through touch, feel stability, comfort, warmth and joy, and even feel the love and care of Baba.

The details are as follows:

1. Stimulate hearing and vision

When the baby feels the pleasure of touching, he can also focus on listening to and observing his parents' expressions and sounds, and at the same time, he can be exposed to auditory and visual stimuli, which can better promote the development of the baby's sensory organs.

2. Enhance sleep quality

Touching your baby can reduce crying and increase sleep. When touching, it can stimulate the concentration of "melatonin" in the blood to increase, help the baby establish a sleep cycle, and regulate the rhythm of the day and night cycle.

The main function of the kidney is to produce urine and excrete the end products of human metabolism

Normal urine: admitted 24 urine volume is 1000-2000ml, daily/night urine volume ratio is 3:1, urine volume is 200-400ml/time; The specific gravity of urine is 1.015-1025, which reflects the renal concentration function. When it is fixed at about 1.010, it indicates that the renal function is serious; The color is yellow, clear and transparent; It is weakly acidic (pH 4.5+7.5, average value is 6); The smell comes from the volatile acid in the urine. After being still, ammonia is produced due to the decomposition of urea, so there is an ammonia odor.

Polyuria: refers to the amount of urine in 24h often exceeds 2500ml. It is found in patients with diabetes (hypertonic), diabetes insipidus, etc.

Changes in motor function: The motor function of the oral cavity, esophagus, stomach, small intestine and large intestine of the elderly has changed to varying degrees. It is mainly manifested in the partial or complete loss of teeth, the gradual degradation of the structure and function of muscles and bones, which leads to the decline of chewing function, poor swallowing function, and food is not easy to chew. Therefore, the elderly are limited in their food choices, and can only eat soft food and refined food, which may result in indigestion, constipation and even the lack of corresponding nutrients. In addition, the peristalsis of the esophagus and stomach and the function of conveying food in the elderly are weakened, the gastric tension and emptying speed are also weakened, the small intestine and large intestine are atrophied