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
Phyla dulcis Phyla dulcis Phyla dulcis is a species of perennial herb that is native to southern Mexico, the Caribbean (Cuba, Hispaniola, and Puerto Rico), Central America, Colombia, and Venezuela. It is known by several common names, including Aztec sweet herb, bushy lippia, honeyherb, hierba dulce, and tzopelic-xihuitl (Nahuatl). Its buds are also sold as "dushi" or "dulce" ("sweet" in Papiamento and Spanish respectively) buttons. This plant has historically been used as a natural sweetener and medicinal herb in its native Mexico and parts of Central America. It was used by the Aztecs and introduced to the Spanish when they arrived. The