Connective tissue is produced from the cell layer of the embryo.

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White fibre is produced by _____ protein. (elastin / collagen)

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_____ is secreted from the mast cell. (Heparin / Haemoglobin)

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Elastin protein is produced from _____ tissue. (connective / muscular)

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Osteocyte cell is found in _____ tissue. (muscular / osseous)

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The Haversian system is found in _____tissue. (Spongy bone/Compact bone)

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The smallest blood cell is _____. (erythrocytes / thrombocytes)