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"Chemical Elements and Human Health" Chemistry and Life PPT download, 22 pages in total.
new knowledge learning
Knowledge point 1: Elements that make up the human body
1. There are many kinds of elements that make up the human body.
2. Macroelements: The content in the human body exceeds ________, including 11 types of O, C, H, N, Ca, P, K, S, Na, Cl, and Mg.
3． Trace elements: Elements whose content in the human body is less than ________, such as Fe, Zn, Se, I, F, etc.
[Tips] The most abundant element in the human body is oxygen, and the most abundant metal element is ________.
Explore point 1: Elements in the human body
[Question Research]How many elements make up the human body? What are macroelements and trace elements? In what form do these elements exist? What effect does it have on the human body?
[Integrated improvement]The human body contains more than 50 chemical elements. Those with more than 0.01% content in the human body are macroelements, and those with less than 0.01% are trace elements. The four most abundant elements are oxygen, carbon, hydrogen, and nitrogen. The remaining elements mainly exist in the form of inorganic salts in aqueous solutions. Some of them are important materials that make up human tissues; some can regulate human metabolism and promote physical health.
Class feedback
Knowledge point 1 Elements in the human body
1. There are many types of elements that make up the human body. Those with a content exceeding 0.01% are called ________ elements, and those with a content less than 0.01% are called ________ elements. In the human body, ________ is the most abundant metallic element.
2. The total mass of trace elements in the human body is less than one thousandth of the mass of the human body, but these elements play an important role in the normal development and health of the human body. Which of the following elements are all trace elements in the human body ()
A. Na, Cl, O B. H,O,N
C. N, Ca, C D. I, Fe, Zn
3． Which of the following are constant elements in the human body ()
A. iron b. Calcium c. zinc d. iodine
Keywords: Free download of PPT courseware for the second volume of the ninth grade of Chemistry published by the People's Education Press, download of Chemical Elements and Human Health PPT, download of Chemistry and Life PPT, .PPT format;
For more information about the "Chemistry and Life Chemical Elements and Human Health" PPT courseware, please click the Chemistry and Life PPT Chemical Elements and Human Health PPT tab.
"Chemical Elements and Human Health" Chemistry and Life PPT:
"Chemical Elements and Human Health" Chemistry and Life PPT, 24 pages in total. Knowledge management 1. Chemical elements in the human body. Macroelements: There are more than 50 elements that make up the human body. Elements whose content exceeds 0.01% in the human body are called macroelements. There are 11 kinds of constant elements, which...
"Chemical Elements and Human Health" Chemistry and Health PPT download:
"Chemical Elements and Human Health" Chemistry and Health PPT download, 23 pages in total. Knowledge review Knowledge point 1 Chemical elements in the human body 1. There are _______ elements that constitute the human body, _____ are macroelements, and the rest are trace elements. ①_______yuan..
"Chemical Elements and Human Health" Chemistry and Health PPT Courseware:
"Chemical Elements and Human Health" Chemistry and Health PPT courseware, 24 pages in total. New Knowledge Learning Knowledge Point 1 Chemical Elements in the Human Body 1. Macroelements In the human body, elements with a content of ________0.01% are called macroelements, such as ________, carbon, hydrogen, nitrogen, _____..