Women ages 30 through 65 can then be screened every 5 years with Pap and HPV cotesting or every 3 years with a Pap test alone. The guidelines also note that women with certain risk factors may need to have more frequent screening or to continue screening beyond age 65.
Petioles support leaf growth. Also called the leaf stalk, the petiole is actually an extension of the leaf in certain plants. It is the structure that connects the leaf to the stem or trunk of most vascular plants.
Leaves are the principle structure, produced on stems, where photosynthesis takes place. Cacti are an exception. The leaves are reduced to spines, and the thick green, fleshy stems are where photosynthesis takes place.1  To compete for light for photosynthesis, i.e., the manufacture of sugars.eaves are the principle structure, produced on stems, where photosynthesis takes place. Cacti are an exception. The leaves are reduced to spines, and the thick green, fleshy stems are where photosynthesis takes place.