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Shapes of the Cervical Os

The normal cervical os may be round, oval, or slitlike. The trauma of one or more vaginal deliveries may tear the cervix, producing lacerations. Illustrated here, from left to right, are an oval os, a slitlike os, and lacerations described as unilateral transverse, bilateral transverse, and stellate.

Variations in the Cervical Surface

Squamous epithelium

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Coping with Asthma

Coping with Asthma

If you suffer with asthma, you will no doubt be familiar with the uncomfortable sensations as your bronchial tubes begin to narrow and your muscles around them start to tighten. A sticky mucus known as phlegm begins to produce and increase within your bronchial tubes and you begin to wheeze, cough and struggle to breathe.

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