There are 92 kinds of natural elements, how many of them are in the human body? 5

The human body is made up of more than 40 elements.

See below for details. The so-called trace elements, in environmental geochemistry, refer to more than 60 elements that only account for the components of the earth, and their content is generally between 1 10-8 1 10-88. In the field of medicine, from the perspective of the structure of the human body, those that account for less than 1/10,000 of the total weight of the human body are trace elements.

According to the body's need for trace elements, those trace elements that are indispensable for maintaining the normal life activities of the organism, must be ingested through food and have a daily dietary requirement of less than 100mg are called essential trace elements. The human body is composed of more than 40 kinds of elements, according to the different content of elements in the body, the elements in the body can be divided into two categories: one is a macro element, accounting for body weight, including carbon, hydrogen, oxygen, phosphorus, sulfur, calcium, potassium, magnesium, sodium, chlorine and other 10 kinds, they constitute the body tissue, and play an electrolyte role in the body; The second is trace elements, accounting for about body weight, including iron, copper, zinc, chromium, cobalt, manganese, nickel, tin, silicon, selenium, molybdenum, iodine, fluorine, vanadium and other 14 kinds, although the content of these trace elements in the body is negligible, but can play an important physiological role.

There are 8 kinds of essential trace elements for the human body, including iodine, zinc, selenium, copper, molybdenum, chromium, cobalt and iron. Trace elements are elements whose content in the body is less than 1/10,000 of body weight.

28 species are found in living organisms.

Hydrogen is the most abundant element in nature, accounting for about 75% of the mass of the universe, and is very extensive, water, fossil energy, and biomass contain a large amount of hydrogen.

Earth: 1Solar system (excluding Earth):

Values by anders

ebihara

Measured in 1982.

What kind of content? Is it a quality score? Or is it a quantitative fraction? Or what? I don't know what you're asking.

The four most abundant elements in the earth's crust.

1.Among the elements of the human body, carbon, oxygen, nitrogen, and hydrogen account for about 96, and have an absolute majority in the ingredient list.

2.In the human body, the elements exist in two main forms: water and carbon-containing organic matter.

3.The contents of each element in the earth's crust from large to small are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, and hydrogen percentages, respectively: oxygen 4 06, silicon 2 30, aluminum 73, iron 75, calcium 45, sodium 74, potassium 47, magnesium 00, hydrogen and others.

There are 92 natural chemical elements in the surface of the earth, among which () and Nian species have been found in the human body.

Correct answer: 81

The periodic table doesn't, it's in the top 92.

More than 100 natural elements have been discovered before the eye is opened. （）

a.The stool is gone.

b.Mistake. Correct answer: B

There are three main categories: macro elements.

Trace elements and age elements.

In addition, according to the body's need for trace elements, it is divided into essential trace elements and non-essential trace elements. The elements that are indispensable for maintaining the normal life activities of the human body are called essential trace elements. The so-called indispensable does not mean that the lack will endanger life and cannot survive, but that the lack will cause the physiological function and structure of the body to abnormal, leading to the occurrence of diseases.

At present, most people recognize that there are 13 kinds of essential trace elements: iron (Fe), copper (Cu), zinc (Zn), cobalt (Co), molybdenum (Mo), manganese (Mn), vanadium (V), tin (Sn), silicon (Si), selenium (Se), iodine (I), fluorine (F), and nickel (Ni). At present, there is no clear biological role and no toxic element is called non-essential trace element.

The classification of trace elements into essential and non-essential, toxic or harmless has only relative significance.

Because even the same trace element can be beneficial at low concentrations and harmful at high concentrations. It does not mean that it is safe to use the element in any concentration. Therefore, in the future, the biological role of trace elements and their safe concentrations should be further studied in order to prevent the blind intake of too many essential trace elements or the removal of a potentially essential "toxic" element from the diet.

With the deepening of research, it may be found that some "non-essential elements" and "harmful elements" have certain biological effects, and may even be essential elements.

Metals: Hemoglobin contains iron and a small amount of copper. Calcium This is known Haha Non-metallic elements: such as hydrogen and oxygen in water, as well as carbon, the basic element that makes up organic matter.

On the ridge of the earth's search, the element () is the most abundant in the world.

a.Hydrogen. b.Oxygen.

c.Nitrogen. d.Carbon.

Correct answer: B