Answer:
Cytoplasm
Explanation:
Eukaryotic cell: cell membrane, cytoplasm and nucleus
Prokaryotic: cytoplasm, has no nucleus
The blood is collected in heparinized capillary tubes to prevent clotting. Heparin is a blood thinner and this anticoagulant is produced naturally by mast cells and basophils. But heparin can not dissolve or break the preformed clots.
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