At the end of their binges, all the rats were injected with leptin, in order to test the adipose tissue's response.

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The tests were repeated on rats, and again in test tubes using tissue taken by biopsy from patients undergoing unrelated medical procedures.

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The fibroblasts are grown in a test tube and then implanted into tissue near the stomach.

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The grippers were also sent after a tough target to test their strength, bovine bladder tissue.

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There has never previously been an effective test for HGH, which stimulates muscle and tissue growth.

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If the same cell taken out to test for illness can also be tested for a tissue match, it says, that's fine.

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