5 Questions
What is the basic living unit of all organisms?
cell
What is the size of an average-sized cell compared to the smallest dot you can make on a sheet of paper with a sharp pencil?
One-fifth
What are the three main regions or parts of a generalized cell?
Plasma membrane, cytoplasm, and nucleus
What is the function of white blood cells?
destroy bacteria
What is the function of red blood cells?
carry oxygen
Study Notes
Cells: The Basic Living Unit
- The cell is the basic living unit of all organisms.
Cell Size
- An average-sized cell is about 1/25000 the size of the smallest dot you can make on a sheet of paper with a sharp pencil.
Cell Structure
Generalized Cell Parts
- A generalized cell consists of three main regions or parts:
Blood Cells
White Blood Cells
- White blood cells, also known as leukocytes, function to protect the body against infection and disease by identifying and destroying foreign substances and pathogens.
Red Blood Cells
- Red blood cells, also known as erythrocytes, function to carry oxygen from the lungs to the body's tissues and carbon dioxide from the tissues to the lungs.
Test your knowledge on cell structure and learn about the basic living unit of all organisms. Explore the composition and size of cells, and discover fascinating facts about the building blocks of life.
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