How many germ cells are there in the human body and how are human germ cells formed

The main motivation for the study is to provide fertility** methods for couples suffering from infertility. For example, women with Turner syndrome have a full or partial deletion of their copy of the X chromosome. However, at the moment the technology is not safe for humans to use, and there are some technical issues that need to be overcome, which may take a long time.

The implementation process of this technology is relatively complex. First, ** cells are extracted from male mice and then transformed into a state similar to stem cells to create so-called induced pluripotent stem cells. Then, by removing the Y chromosome, an X chromosome is "borrowed" from another cell, and these cells, which have two X chromosomes, are placed in an ovarian organoid for culture, resulting in the formation of eggs.

The realization of this technology has given many people a new hope for infertility patients. However, we also need to recognize that there are still many technical and social problems in the current application of this technology. In terms of technical issues, experiments have only been carried out in mice, and there are still many problems with the quality of egg cells.

On social issues, there is a need for in-depth discussion and research on whether the technology can be applied to humans and whether it is accepted by society.

The technology also needs to be used with great care. After all, scientists still need to study and explore more details and risks to ensure its safety and efficacy. Therefore, the technology will not be used in clinical practice for the next few years.

In conclusion, the advent of this technology is an important milestone that marks a major technological breakthrough in the field of human reproduction. Although there are still many unknown and uncertain factors, we have reason to believe that with the efforts of scientists, it is expected to become an effective means to provide fertility for infertility patients, bringing more well-being and happiness to mankind.

There are about 40 trillion to 60 trillion cells in total, and the average diameter of cells is between 10 and 20 microns.

The human cell is the basic unit of structure and function of the human body. The largest of human cells is a mature egg cell, which is about 200 microns in diameter; The smallest is platelets, which are only about 2 microns in diameter.

The cells in the human body are broadly divided into nerve cells, muscle cells, bone cells, blood cells, epithelial cells, and so on.

The human brain has tens of billions of cells, some of which are dormant, and about 1% of the cells participate in the brain's neurological activities.

1. The human ear has 100,000 auditory nerve cells.

2. There are about 10 million olfactory cells in the human nose.

3. The human brain has 100000000000 nerve cells.

4. The human body produces 100,000,000,000 new red blood cells every day.

5. Each eye contains about 100 million rod cells.

6. Gold has a high melting point, reaching 1063 degrees.

7. There is only an average of 1 gram of gold in every 300 tons of crustal stones.

8. China's land area is 9,600,000 square kilometers.

9. The average distance between the Moon and the Earth is 384,400 kilometers.

10. The temperature of the lunar core is about 1000 degrees.

11. The diameter of the moon is about 3,476 kilometers.

The cells with the most mitochondria in the human body are the hepatocytes of the liver. There are about 2,000 mitochondria in each hepatocyte. The normal mitochondrial lifespan is one week, and mitochondria can be proliferated by ***.

The main chemical components of mitochondria are proteins, accounting for about 65%, and the other components are glycerin, lecithin, cerebral phospholipids and cholesterol. Mitochondria contain a variety of enzymes (proteins), and their main role is to continuously provide energy for cellular functional activities, and about 95% of the total energy necessary for cellular life activities comes from mitochondria. Hepatocytes are the most active cells in the body.

Why people can't live without water.

On Earth, where there is water, there is life. All life activities originate from water. The body is about 65% of body weight.

Among them, the cerebral marrow contains 75% water, the blood contains 83% water, the muscles contain 76% water, and even the hard bones contain 22% water! Without water, nutrients from food cannot be absorbed, waste products cannot be excreted from the body, and drugs cannot reach the site of action. Once the human body is dehydrated, the consequences are very serious.

Lack of water 1%-2%, feeling thirsty; Dehydration 5%, dry mouth, wrinkles, confusion, and even visual hallucinations; A 15% lack of water is often worse than starvation. Without food, people can live for a long time (some estimate it is two months), and if they don't even have water, at most because 80% of the human body is water Water is H2O. That is, 2 hydrogen and 1 oxygen.

With the combination of these two elements. will produce a statement. Therefore, people can live about a week without water.

In the composition of the human body, water accounts for the largest proportion. More than 90% of the blood, saliva, milk, sweat and urine in the human body are water; The water content of tissues and organs is very high, such as the heart, liver, brain, lungs, kidneys, muscles, and water content is between 70% and 84%, which shows that water is the most abundant component of the human body. Water is very important in the human body.

Water helps food digestion and absorption, and dry food cannot be swallowed without water. There is no digestive juice to help dissolve, and the human body cannot absorb nutrients; Water is a necessary condition for various chemical reactions in metabolism, without water, metabolism cannot be carried out; It is also inseparable from water to transport nutrients to various tissues for absorption, and to transport waste materials to excretory organs and excrete them from the body; Water helps the body dissipate heat by sweating to keep body temperature constant; Sodium, potassium, chloride, magnesium, calcium, phosphorus, etc. are none.

Machine salts are dissolved in water to maintain the normal osmotic pressure of body fluids, water is the solvent of enzymes, hormones, and antibodies, and the absence of water is equivalent to the loss of these substances; Water is also a lubricant for joints and muscles, without which they cannot work properly. Therefore, we say that life cannot be separated from water, and without water, there is no life.

The number of somatic cells in an adult is uncountable because every day cells are shed, die, and new cells are produced.

But someone once counted the number of cells in a newborn baby. It's about 1 trillion.

Why don't you ask how many stars there are in the sky, if you really want to count, you count by the mass of the cells

The brain's 100 billion neurons are functioning.

It is the structural and functional unit of the human body. There are about 400,000-60 trillion cells in total, and the average diameter of the cells is between 10 and 20 microns. With the exception of mature red blood cells, all cells have a nucleus that is the center that regulates cellular action.

The largest are mature egg cells, with a diameter of more than millimeters; The smallest is platelets, which are only about 2 microns in diameter. The lifespan of intestinal mucosal cells is 3 days, the lifespan of liver cells is 500 days, and the lifespan of nerve cells in the brain and bone marrow is several decades, which is almost the same as the lifespan of the human body. Some white blood cells in the blood only live for a few hours.

In the entire human body, 100 million cells die every minute. The most amazing thing is that the nerve cells of the brain transmit nerve impulses at a speed of more than 400 kilometers per hour, which is equivalent to half the speed of a 777 aircraft.

The number of cells in an adult's body is about 100 trillion.

The human body has about 60 trillion cells, and each cell contains 10,000 times as many molecules as there are 10,000 times the number of stars in the Milky Way.

Humans have about 10 cells to the power of 14.

Billions, or innumerable, cells are born and die every day.

How many cells a person has is like an infinite number of stars in a galaxy, and the human body is wonderful and beautiful!

No, there is a difference in the number of chromosomes in their cells.