A/an , or birth defect, can result in a malformation such as the absence of a normal body opening or the failure of a structure to be tubular, which is termed . next

Atresia

A/an , or birth defect, can result in a malformation such as the absence of a normal body opening or the failure of a structure to be tubular, which is termed atresia.

Atresia is the absence of normal passage or the failure of a structure to be tubular or fully formed. Atresia can occur in any structure of the body. Examples of atresia include imperforate anus, which is the malformation of the hole between the rectum and anus, and choanal atresi, which is the blockage of the back of the nasal passage,usually by abnormal bony or soft tissue.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

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