At MinuteClinic, vaccinations for children as young as 18 months (5 years in CT) through seniors are administered by a nurse practitioner or physician assistant.** No appointment necessary. Flu is more dangerous than the common cold for children. Flu (Influenza) vaccine for children available at MinuteClinic. Patients 18 months and older in most states, 24 months and older in KY, 5 years and older in CT. About the Flu
Segmented worms are bilaterally symmetrical. Their body consists of a head region, a tail region and a middle region of numerous repeated segments. Each segment is separate from the others by a structure called a septa.
The big difference between roundworms and segmented worms is that segmented worms have a real circulatory system with blood. Many segmented worms also have less developed eyes than roundworms-these segmented worms only have eyespots, like flatworms. But other segmented worms do have more developed eyes. By about 510 million years ago, some of these segmented worms were already evolving into fish. But many of them stayed segmented worms, and there are still lots of segmented worms all over the Earth today, on land and especially in the water.