释义 |
EncyclopediaSeemilk linemammary crest
mam·ma·ry crest (măm'ă-rē krest) Bandlike thickening of ectoderm in the embryo extending on either side from just below the axilla to the inguinal region; in human embryos, the mammary glands arise from primordia in the thoracic part of the ridge. Synonym(s): mammary fold, milk line, milk ridge. |