Table 2.

Summary of cell morphology of periosteum and bone marrow cultures. Periosteum (P) vs. bone marrow (BM), unpaired Student's t-test, ^∗∗∗∗P < 0.0001.

Cell morphology characteristic		Number of cells measured	Average cell thickness (μm)	Cell surface area (μm2)
Dividing	P	51	6.1±2.5∗∗∗∗	497 ± 172
	BM	23	3.4 ± 0.6	493 ± 126
Spindle	P	2438	1.4±0.3∗∗∗∗	827±414∗∗∗∗
	BM	1061	1.3 ± 0.3	668 ± 297