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Cell
Smallest building block of life. Too small to see without a microscope.
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A Look at Life
📖 Study · A Look at Life
A Look at Life
All living things are made of cells. Cells make tissues, tissues make organs.
🎯 What you'll learn
- ✓Cell is smallest unit of life
- ✓Plant vs animal cells
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Plant cell
Has cell wall and chloroplasts (make food).
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Animal cell
No cell wall — has flexible membrane.
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Tissue → Organ
Cells form tissues. Tissues form organs.
cells → tissue → organ
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Microscopes
Microscopes let us see cells too small for our eyes.
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Organs
Lots of tissue working as one job: heart, lungs, brain.
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Systems
Several organs working together: digestion, breathing, etc.
lungs + airways = respiratory