Chemical Composition of Living Organisms
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Questions and Answers

Which are the most common 4 elements found in the living body?

Carbon, Hydrogen, Oxygen, Nitrogen

How many elements out of the 92 present in nature are found in the living body?

About 25

Name 3 elements other than Carbon, Hydrogen, Oxygen, and Nitrogen that are essential for the survival of organisms.

Sulphur, Phosphorous, Sodium

What is the main element that is present in the highest percentage in the human body?

<p>Oxygen</p> Signup and view all the answers

What are some examples of trace elements that are essential for organisms?

<p>Potassium, Calcium, Iron</p> Signup and view all the answers

Which elements, other than Carbon, Hydrogen, Oxygen, and Nitrogen, are considered essential for the survival of organisms?

<p>Sulphur, Phosphorous, Sodium, Potassium, Calcium, Magnesium, Iron, Chlorine</p> Signup and view all the answers

Why are only about 25 elements out of the 92 elements present in nature found in the living body?

<p>These 25 elements are essential for the structure and function of biological molecules and processes in organisms.</p> Signup and view all the answers

How do the main elements in the human body, such as Carbon, Hydrogen, Oxygen, and Nitrogen, contribute to the overall structure and function of organisms?

<p>These elements are the building blocks of biological molecules like proteins, nucleic acids, and carbohydrates, which are essential for life.</p> Signup and view all the answers

Explain the significance of trace elements in the survival of organisms.

<p>Trace elements, although present in small amounts, are vital for enzyme functions, cellular processes, and overall health of organisms.</p> Signup and view all the answers

How do the elements essential for the survival of organisms vary in their distribution within the body?

<p>Different elements are found in different locations within the body, contributing to specific functions and structures.</p> Signup and view all the answers

Study Notes

Chemical Composition of the Body

  • The human body is composed of a variety of chemical compounds formed by the bonding of naturally existing elements in different ways.

Elements in the Living Body

  • There are only about 25 elements present in the living body out of the 92 naturally existing elements.
  • These 25 elements are present in different locations in the body in different forms.

Most Common Elements

  • The four most common elements in the living body are:
    • Carbon
    • Hydrogen
    • Oxygen
    • Nitrogen

Essential Elements

  • Besides the four most common elements, the following elements are also essential for the survival of organisms:
    • Sulphur
    • Phosphorous
    • Sodium
    • Potassium
    • Calcium
    • Magnesium
    • Iron
    • Chlorine

Elemental Percentages in the Human Body

  • The diagram below shows the percentages of main elements in the human body.

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Description

Explore the variety of chemical compounds that make up the bodies of living organisms, formed by the bonding of naturally existing elements. Learn about the most common elements present in the living body and their significance.

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