Cell Biology
A cell is a membrane bounded unit that contains DNA and cytoplasm. The greater relative surface area of small cells allows more rapid communication between the cell interior and the environment.
Fast Facts
1.Basic types:
Prokaryotic & Eukaryotic
2.General types:
Plant & Animal
3.Organelles:
Cell membrane
Nucleus
Mitochondria
Ribosome
Nucleolus
Endoplasmic reticulum
Vacuole
Microbody
Lysosome
Golgi complex
Centrioles
Chloroplast
Cell wall
4.Adult human contain 60 trillion cell
5.The retina contain 125 million light sensitive cells
6.Smallest cells are bacterial cells 0.2 micrometer in length but Escherichia coli., intestinal bacteria
of human is 2 micrometer.
7.Average size of an animal cell is 20 micromater.
8.Average size of plant cell is 35 micrometer.
9.Examples for very large cells; egg cells & cheek cells.
10.Egg cells are 3cm long.
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