How many sweat glands are there in the human body, and the most distributed parts of the human body

Sweat glands, there are about 620 sweat glands per square centimeter in the center of the foot. The rest of the body has only 143-339 sweat glands, which means that the hearts of the hands and feet have 2-4 times more sweat glands than other parts. There are as many as 5 million sweat glands in the human body, of which 2 3 sweat glands are distributed in the palms of the hands.

Sweat glands, organs that secrete sweat. All ** have sweat glands, with the palms and soles of the feet being the most numerous. Sweat gland is a tubular structure, which can be divided into secretion and excretion, the secretion is formed by a thin tube coiled, located in the dermis and subcutaneous tissue, the excretory part is a thin tube leading to the surface of the secretion department, and the opening is funnel-shaped, called sweat pores.

The main component of sweat is water, and the rest are inorganic salts, urea, uric acid, etc. So sweating has an excretory effect. Sweating also regulates body temperature, as the evaporation of sweat takes away heat from the body.

In the heat of summer. If the sweat glands are blocked and the sweat does not drain smoothly, it will become inflamed and form prickly heat. Sweat glands can be divided into two types:

One is the sweat glands, which are the kind of sweat glands that usually sweat, and there are many small ones, about 2 million. The other is the apocrine glands, which are mainly distributed in the armpits, groin, etc. If someone has a strong secretion of apocrine glands in the fluid socket and emits a strong odor, it is "axillary odor" disease.

There are two types of sweat glands in the human body, one is the eccrine gland; The other is the apocrine gland, also known as the stinky sweat gland and the parietal gland. Acrine glands are distributed throughout the body, except for the dense distribution of sweat glands in the heart of the foot, the number of other parts is generally 140 340 per square centimeter. Apocrine glands, on the other hand, are only distributed in certain special parts and are composed of glands, excretory ducts and sweat pores, which are located at the junction of the reticular layer and the subcutaneous tissue.

Most of them are located at the junction of the reticular layer and the subcutaneous tissue, and a very small number of apocrine glands are distributed in the subcutaneous tissue and fat layer.

On average, there are 143-339 acrine glands per square centimeter of aperonement.

On a square inch of ** — the size of 2 dum's fingernails, less than the thickness of 2 coins — there are 645 on a square inch of ** — 2 dum's fingernails the size of less than 2 coins thick — there are 645 sweat glands, 77 feet of nerve fibers, 1,000 nerve endings of sweat glands, 77 feet of nerve fibers, and 1,000 nerve endings.

Sweat glands are derivatives of the first system, that is, sweat glands belong to the first system.

Sweat glands are a kind of mammalian round glands, which can secrete sweat and are divided into two types: apocrine glands and apocrine glands.

Single-tubular glands, glands present in the dermis or subcutaneous tissue in the flexed silk sphere. The discharge tube is spiral-shaped and opens on the surface of the epidermis. The opening is called the sweat mouth imitation collapse.

Outside the gland, there are slender smooth muscle fibers involved in sweat secretion, which are surrounded by a dense network of branched capillaries of the arteries.

Answer: The case of imitation limb huai] :d

Sweat glands are all over the body**, and hunger holes are most concentrated in the palms and soles of the feet. There are no sweat glands in the human body, except for a very few parts of the human body, such as the lips. His friends and other places are full of sweat glands. Therefore, the answer to this question is D.

The secretion of sweat glands is normally controlled by the sympathetic nerves. If the patient's sympathetic nerves are tense, excited, stressed, or due to high temperatures, abnormal sweating can occur. Second, it can also be caused by sympathetic nerve damage or abnormal reactions.

For example, excessive secretion of acetylcholine can cause excessive secretion of eccrine glands, which can cause patients to sweat easily. In addition, when the patient's sweat gland secretion is abundant due to genetic factors, the nerves innervating the sweat glands are also more sensitive. In general, during exercise, emotional agitation and mental tension can lead to sympathetic arousal, so it is easy to sweat.

Sweat is mainly formed through the secretion of sweat glands. Many factors can affect the degree of sweating. For example, sweating of the sense of taste caused by eating some spicy food, nervous sweating caused by emotional stress, or increased secretion of sweat glands due to an increase in body temperature can all cause sweating.

Sweat can significantly regulate body temperature, moisturize**, and prevent**dryness. If the excretory or production function of sweat is abnormal, a corresponding disease occurs, such as an abnormal increase in body temperature caused by the absence of sweat.

When we are in a hot environment, or due to factors such as exercise, emotional stress, etc., the heat produced by the body increases. At this time, sweat glands on the surface of the body secrete sweat. This is a normal physiological phenomenon that is used to dissipate heat, regulate body temperature, and take away waste from metabolism in the body.

Because of this, most people don't care about sweating. There may be another secret behind sweating. Abnormal sweating in different parts of the body can mean different health problems.

When sweating frequently on the forehead, the first thing to consider is whether the thyroid is not functioning properly. In addition, TCM believes that when the liver yang is hyperactive, it will also cause sweating on the forehead. When the nose sweats frequently, it indicates that the body has a lack of lung qi, that is, the physiological function of the lungs has declined.

This can be an anomaly caused by factors such as cold climate, excessive fatigue, chronic exposure to negative emotions, etc.