Difference between revisions of "Sizes of things"
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*10<sup>14</sup> (100 trillion) [[w:Cell (biology)|cells]] in the Human body | *10<sup>14</sup> (100 trillion) [[w:Cell (biology)|cells]] in the Human body | ||
*A typical cell size is 10μm, (0.01mm) some [[w:pollen|pollen]] is a bit smaller than that but is made of several cells. The [[w:Cell membrane|cell membrane]] (wall) is about 10nm thick for animals cells. | *A typical cell size is 10μm, (0.01mm) some [[w:pollen|pollen]] is a bit smaller than that but is made of several cells. The [[w:Cell membrane|cell membrane]] (wall) is about 10nm thick for animals cells. | ||
| − | * | + | *The [[w:cell nucleus|cell nucleus]] is 11-22μm and is typically about 10% of the total volume, so the cell would have to be about 50-100μm. Typical mammalian cell nucleaus has 3000-4000 pores of 100nm diameter. |
| + | *Animal cells are on the borderline of visibility, they can be seen but only as a spec of dust. | ||
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| + | ;Atoms | ||
| + | *The [[w:angstrom|Angstrom]] is 0.1nm and is rougly the size of a typical atom (0.5A for Hydrogen to 3.8A for Uranium). | ||
| + | *The distance between carbon atoms in β sheets in enzymes etc is roughly 5A (0.5nm). | ||
| + | *This would make the nucleus in the region of 30,000 atoms diameter, and the animal cell 150,000 atoms. | ||
Revision as of 05:03, 19 September 2006
- Cells
- 1014 (100 trillion) cells in the Human body
- A typical cell size is 10μm, (0.01mm) some pollen is a bit smaller than that but is made of several cells. The cell membrane (wall) is about 10nm thick for animals cells.
- The cell nucleus is 11-22μm and is typically about 10% of the total volume, so the cell would have to be about 50-100μm. Typical mammalian cell nucleaus has 3000-4000 pores of 100nm diameter.
- Animal cells are on the borderline of visibility, they can be seen but only as a spec of dust.
- Atoms
- The Angstrom is 0.1nm and is rougly the size of a typical atom (0.5A for Hydrogen to 3.8A for Uranium).
- The distance between carbon atoms in β sheets in enzymes etc is roughly 5A (0.5nm).
- This would make the nucleus in the region of 30,000 atoms diameter, and the animal cell 150,000 atoms.
