They can be used to contain cellular waste and to isolate materials that may be harmful to the cell.
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Red blood cells and the heart causes response to stimuli
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I think it's more man-made possibly, but it might be both. You might want to see if someone says both, both I guess C maybe.
An example of a haploid cell is the sperm cell. A haploid cell has a complete set of chromosomes. Through meiosis, a haploid cell called the gametes is produced. Haploid cells could also refer to the number of chromosomes in an egg or a sperm cell.
The hips ball and socket joint is much larger than the shoulders. its also protected by more muscle.