Rhabdopleurida
Rhabdopleurida (phylum Hemichordata, class Pterobranchia) An order of colonial animals in which zooids are pectocaulus. The mesosoma bears one pair of arms. The gonads are unpaired, with a single gonadial opening on the right side. There are no branchial pores. The skeleton (coenoecium) is built of an irregularly branching system of chitinous tubes composed of regular growth bands which are clearly defined by transverse growth lines. Their first known occurrence is in the Upper Cretaceous.
More From encyclopedia.com
Epinastic Growth , epinastic growth (epinasty) Differential growth of the upper or adaxial part of a plant organ. A well-known example is the growth of the upper side o… Graptolithina , Skip to main content
Graptolithina
Graptolithina (graptolites; phylum Hemichordata) A class of extinct, colonial, marine organisms which secreted a c… Human Growth Hormone , Human growth hormone
Human growth hormone (GH), also called somatotropin, is a protein that stimulates growth. GH must be secreted (released) in just… Growth , Growth
Growth, as used as a term to discuss the human body, has a number of meanings. In general terms, growth is the process towards full developmen… Maxilla , max·il·la / makˈsilə/ • n. (pl. max·il·lae / makˈsilē; -ˈsilˌī/ ) Anat. & Zool. the jaw or jawbone, specifically the upper jaw in most vertebrates. I… Pterobranchs , Pterobranchia (phylum Hemichordata) A class, or perhaps a full phylum, of minute, fixed, colonial, deep-sea organisms which secrete an external cutic…
You Might Also Like
NEARBY TERMS
Rhabdopleurida