Developmental Biology Unable to load video. Please check your Internet connection and reload this page. If the problem continues, please let us know and we'll try to help. An unexpected error occurred. Please check your Internet connection and reload this page. If the problem continues, please let us know and we'll try to help. Summary In this method, embryonic cardiac tissues are surgically microdissected, dissociated, fluorescently labeled, and implanted into host embryonic tissues.