Table 2.

Orientation index (OI) for pericardium samples measured perpendicular and edge-on to the surface for samples cut vertically or horizontally from the pericardium.

Direction measured	Animal age	OI	Std deviation	No. of pericardia	No. of measurements
Perpendicular	Adult	0.020	0.096	10	42
Perpendicular	Neonatal	0.071	0.152	10	42
Edge-on vertical	Adult	0.581	0.051	2	52
Edge-on horizontal	Adult	0.669	0.032	2	27
Edge-on vertical	Neonatal	0.800	0.031	2	30
Edge-on horizontal	Neonatal	0.763	0.106	2	27