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| the nostrils or the nasal passages. |
| the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel. |
diastasis di·as·ta·sis (dī-ās'tə-sĭs)
n.
Separation of normally joined parts, such as the separation of certain abdominal muscles during pregnancy. Also called divarication.
The last stage of diastole in the heart, occurring just before contraction and during which little additional blood enters the ventricle.