Table 2.

Data of the primary osteons’ vascular canals, Haversian canals and secondary osteons in adult male rats subchronic exposed to 30 mg of CdCl ₂ /L in drinking water for 90 days (Cd group) and the control rats (control group)

Measured structure	Group	N	Area (μm 2 )	Perimeter (μm)	Max. diameter (μm)	Min. diameter (μm)
Primary osteons’ vascular canals	Control group	436	393.49 ± 123.05	71.58 ± 12.37	12.87 ± 2.68	9.62 ± 1.68
	Cd group	405	341.39 ± 65.77	66.74 ± 7.27	11.77 ± 1.08	9.29 ± 1.13
	T-test		t = 7.732	t = 6.975	t = 7.007	t = 3.385
			df = 674.963	df = 712.451	df = 767.944	df = 768.604
			P = 0.001	P = 0.001	P = 0.001	P = 0.001
Haversian canals	Control group	208	428.3 ± 75.75	74.94 ± 7.3	13.04 ± 1.56	10.73 ± 1.17
	Cd group	227	384.94 ± 73.23	70.9 ± 6.94	12.52 ± 1.67	9.84 ± 1.31
	T-test		t = 6.403	t = 6.403	t = 3.533	t = 7.880
			df = 483	df = 483	df = 483	df = 483
			P = 0.001	P = 0.001	P = 0.001	P = 0.001
Secondary osteons	Control group	208	6408.74 ± 1820.97	292.98 ± 39.59	51.64 ± 8.17	39.51 ± 6.2
	Cd group	227	4583. 64 ± 1326.92	240.60 ± 35.32	41.50 ± 6.92	34.6 ± 5.32
	T-test		t = 12.467	t = 15.399	t = 14.651	t = 9.294
			df = 408.155	df = 483	df = 445.501	df = 448.265
			P = 0.001	P = 0.001	P = 0.001	P = 0.001

N: number of measured structures.