Is there water in human cells, and what is the cell with the most aqueous channels in the human body

Of course, most of it is water, not free.

The water in an adult's body accounts for about 60-70 of the total body weight, and the younger the age and the fatter the body, the greater the proportion of water, such as a 5-kilogram baby, the water accounts for more than 4 kilograms. Of course, there are obvious differences in the water content of various parts of the human body, such as bones only contain 16-46 water, muscles contain more than 70, and plasma, cerebrospinal fluid and other water proportions are more than 90%. Water is not evenly distributed in the human body, about 40 percent in cells, 20 percent between tissues, and 5 percent in blood.

Therefore, life and water are inextricably linked.

You and most of it is water.

1. The content of water.

The amount of water in the body varies greatly from one organism to another. For example, the water content of the average organism is between 60 and 95, and the water content of the body of the jellyfish living in the ocean can reach 97.

The amount of water varies according to the different stages of growth and development of organisms. Early Childhood, Adulthood; The young period is the mature period.

The content of water in different organs of the same organism is also different, such as myocardial water content 79 and blood water content 82 .

2 forms of existence of water.

In cells, water can be divided into free water and bound water.

Free water, most of the water in the cell exists in a free form, can flow freely, and its content accounts for about all the water in the cell. Its role is to be a good solvent inside the cell, participate in biochemical reactions, provide a liquid environment for the cell to transport nutrients and metabolic wastes.

Bound water, water that binds to other substances of the cell, and its content accounts for about all the water in the cell. Its role is an important part of the cell structure.

3. The relationship between free water and bound water.

Free water and bound water can be converted to each other under certain conditions.

The ratio of free water to bound water is related to the metabolic strength and stress resistance of the cell or organism. When the ratio of free water to bound water is large, its metabolism is vigorous and the growth is fast, but the stress resistance is poor. When the ratio of free water to bound water is small, its metabolism is slower, its growth is slow, but it is more resistant to stress.

The cells with the most aqueous channels in the human body are:Renal tubulesCell.

The renal tubule is an elongated epithelial tubule 30 to 50 mm long connected to the parietal layer of the renal vesicle with reabsorption.

and excretion function, which plays a key role in the excretion of metabolites and the maintenance of the body's fluid balance and acid-base balance.

Structure and function.

According to different morphological structures, distribution locations and functions, renal tubules are mainly divided into three parts: proximal convoluted tubule, medullary loop and distal convoluted tubule.

Proximal convoluted tubule: It is connected to the renal sac cavity, which is the thickest segment of the renal tubule, coiled around the renal corpuscle. The tube wall is composed of a single layer of cubic epithelial cells.

The lumen is small and irregular, and is an important part of tubular reabsorption. The free surface of the cell has a brush-like border and is composed of microvilli, a structure that expands the cell surface area.

Nuclear trapping facilitates reabsorption. Change the mind of leniency.

The cells with the most water-containing channels in the human body should belong to the small intestine.

About 60% of the human body is water, and the metabolism of cells and the exchange of substances in the microcirculation are carried out in aqueous solution.

In the human body, water can also regulate the body temperature of the remaining joints, transport nutrients and oxygen, remove waste products and toxins, and lubricate and protect tissues and organs.

The total daily water intake of a person is about 2500 ml.

There are 3 inlets and 4 outlets for water intake and metabolism.

Entrance: First, drink water. Including a variety of water, such as boiled water, mineral water, beverages, tea, about 1200 ml.

Second, food. For example, foods such as radishes and tomatoes contain water, as well as rice. Chinese like to drink soup and eat hot noodle soup, as well as porridge, these foods contain a lot of water, about 1000 ml.

At a standard room temperature of around 20, the total output of water is also about 2500 ml.

Exports: First, kidneys. It is excreted in the form of urine, which is generally about 1500 ml a day.

Second, breathe. When a person breathes, they exhale some water from their lungs, about 350 ml per day.

Third**. At room temperature, a person will generally evaporate 500 ml of water a day by **. There are more summers and less winters, and the amount of exercise is different, and the amount of water evaporated is also different, which varies greatly.

Fourth, stool. People excrete 150 ml of water a day through their stool, but people with constipation and diarrhea vary greatly.

Under normal circumstances, ordinary people should drink 1200 1500 ml of water every day, but when it is hot, you should pay attention to drinking more water, and people who sweat a lot or exercise a lot should also drink more water.

Some people say that you need to drink 8 glasses of water a day, and some people say that you need to drink 12 glasses of water, so whether it is 8 glasses of water or 12 glasses of water, this varies from person to person, and there is no one-size-fits-all quantity.

How do you know if you're drinking the right amount of water for a day?

There are two main indicators to observe:

One is to see if you are thirsty, and it is not right to drink water when you are thirsty. If you drink the right amount of water, you should not feel thirsty.

The other is to observe the color of the urine and the amount of urine produced. Under normal circumstances, the urine is pale yellow, and the amount of urine produced a day is about 1500 ml, and it is generally urinated once every 3 to 4 hours. If you don't want to go to the toilet for half a day, or the urine excreted by the limbs is dark yellow, it means that you don't drink enough water; On the other hand, if you go to the toilet frequently and your urine is as clear as water, you have drunk too much.

Bound water: Bound water is an important component of cellular structure.

Free Water: 1Free water is a good solvent inside the cell and provides the medium for the reaction.

2.Transport of substances.

3.Involved in chemical reactions.

4.Maintain cell morphology.

1. Water is the most important component of cells, which helps cells to exchange substances.

2. Water is both a reactant and a solvent in the cell. Water molecules are involved in some important reactions of life activities, in the synthesis process of macromolecules, water is the product, and in the decomposition reaction, water is the reactive agent.

3. In addition to being used as a reaction agent, because water is a polar molecule, it is the best solvent for various polar organic molecules and ions, mainly by the formation of hydrogen bonds to dissolve these molecules and ions.

4. There are two forms of water in the cell. A part of the water combines with other substances in the cell, which is called bound water.

1) Bound water: Bound water is an important component of cell structure, which accounts for about.

2) Free water: Most of the water exists as free water, which is called free water. It is a good solvent in the cell, and water can ensure the liquid environment of the cell. Many reactions within the cell require water to participate, and nutrients are also transported to the waste.

Free water is a good solvent within the cell, providing the reaction medium.

b, transport substances.

c. Participate in chemical reactions.

d. Maintain cell morphology.

Bound water is an important component of cellular structure. The functions of free water are: firstly, free water is a good solvent in the cell, secondly, it provides a reaction medium to transport substances, then it participates in chemical reactions, and finally it can maintain cell morphology.

There are four main roles of water:

1.Water is an important part of the cell and is divided into two parts: free water and bound water. The greater the proportion of free water, the more vigorous the metabolism of the organism; The presence or absence of bio-life force that combines water and cells is related.

For example, drying rice is to let the free water leave the living body, so that the metabolism of the seeds is not so vigorous, and it can be stored for a longer time. When the seed is heated, the seed loses its binding water, which makes it lose its vitality.

2.as a solvent for biochemical reactions. In chemical reactions, the more active reaction is the ion reaction in the liquid, so water is used as a solvent for reactants and products in living organisms.

3.as a carrier for transportation. For example, water in the blood is like water in a river, so that the red blood cells in it can flow to all parts of the body with the flow of blood. There is also water that dissolves urea in it and transports it away.

4.Involved in metabolism. For example, in the aerobic respiration of cells, water is involved in the reaction with pyruvate to produce carbon dioxide and reduced hydrogen.

There are two forms of existence of water inside the cell:

1.A part of the water is combined with other substances in the cell, called bound water. It is an important component of the cell structure, accounting for.

2.Most of the water exists as free water, which is called free water. It is a good solvent in the cell. Water ensures the fluid environment of the cells. Many reactions within the cell require water to participate. It can also transport nutrients and send out waste.