Monocytes circulate in the blood for 10-20 hours before entering tissues and differentiating into macrophages.
Monocytes remain in the blood for 10-20 hours before migrating into tissues to become macrophages.
| Front | Who predicted the source of oxygen in photosynthesis What was it Experiment performed |
|---|---|
| Back | Van Niel O2 comes from water (studied bacteria that don't evolve O²) use O-18 isotopic tracer (first use of isotopic tracer in biology) |
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