retractor collar

reproductive system, animal — Introduction any of the organ systems by which animals reproduce. The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… … Universalium
Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… … Wikipedia
Saddle seat — is a style of horseback riding within the category of English riding that is designed to show off the high trotting action of certain horse breeds. The style developed into its modern form in the United States, and is also seen in Canada and… … Wikipedia
Actiniaria — Anémonas Anthopleura xanthogrammica … Wikipedia Español
Hexacorallia — Hexacorallia Actínidos, según Haeckel … Wikipedia Español
moss animal — bryozoan. [1880 85] * * * ▪ invertebrate Introduction also called bryozoan, any member of the phylum Bryozoa (also called Polyzoa or Ectoprocta), in which there are about 5,000 extant species. Another 15,000 species are known only from… … Universalium

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