Biology Lecture: Trace Elements

Introduction

• Topic: Trace Elements
• Reference: For more on elements, see the video titled "Elements vs. Compounds."

Common Elements

• Most Common Elements: Carbon, Oxygen, Hydrogen, Nitrogen
  • Make up approximately 96% of all living matter.

Trace Elements

Biological Perspective

• Definition: A dietary element needed in very small quantities.
• Function: Essential for growth, development, and healthy physiology.
• Examples:
  • Iodine
  • Iron
  • Copper
  • Zinc
• Applications:
  • Present in daily multivitamins.
  • Added to foods (e.g., iodized salt contains iodine).

Chemistry Perspective

• Definition: Element found in very small concentrations in a sample.
• Criteria: Present at concentrations of less than 100 parts per million.

Conclusion

• Summary: Trace elements are crucial despite their small quantities.
• Further Learning: Watch more videos on Biology Professor for additional insights.