what is the difference between these?
[Term]
id: MA:0002081
name: adrenal vein
namespace: adult_mouse_anatomy.gxd
is_a: MA:0000067 ! vein
[Term]
id: MA:0002229
name: suprarenal vein
namespace: adult_mouse_anatomy.gxd
is_a: MA:0000067 ! vein
no corresponding concept in EMAPA