Animal mesoderm forms by enterocoelic pouching, through invagination of the endoderm. The main deuterostome phyla are the Echinodermata and the Chordata. Echinoderms are exclusively marine and include starfish, sea urchins, and sea cucumbers. The chordates are dominated by the vertebrates (animals with backbones), which consist of fishes, amphibians, reptiles, birds, and mammals. The deuterostomes also include the Hemichordata (acorn worms). The Ecdysozoa are protostomes, named after their shared trait of ecdysis, growth by moulting. They include the largest animal phylum, the Arthropoda, which contains insects, spiders, crabs, and their kin. All of these have a body divided into repeating segments, typically
Starfish Project Starfish Project The Starfish Project is a UK-based not-for-profit therapy programme which helps people who stammer or stutter to overcome their speech through the use of diaphragmatic breathing (also known as "costal breathing"). The programme also teaches participants to reassess negative emotions surrounding their stammering through the use of avoidance reduction therapy (see stuttering therapy). Participants attend a three-day residential course near Hailsham in the UK during which a diaphragmatic breathing technique and non-avoidance strategies are taught. Following this initial course, participants are able to attend additional follow-up courses at the same venue without charge from the Starfish Project as