zooid's Usage Examples:

In Dictyonema the branches show thecae of two kinds: (I) the ordinary tubular thecae answering to those of the Graptoloidea and occupied by the nourishing zooids; and (2) the so-called bithecae, birdnest-like cups (regarded by their discoverers as gonothecae) opening alternately right and left of the ordinary thecae.

In Actinia, as in all Anthozoan zooids, the coelenteron is not a simple cavity, as in a Hydroid, but is divided by a number of radial folds or curtains of soft tissue into a corresponding number of radial chambers.

, and it will serve, although it does not form a skeleton or corallum, as a good example of the structure of a typical Anthozoan polyp or zooid.

nigrescens and in some other species a zooid may contain a pair of ovaries, a pair of testes, or an ovary and a testis, although the males, females and hermaj phrodites do not differ from one another in external characters.

Body-cavities of zooids not continuous with one another.

A, Schematic longitudinal section through a zooid and bud of Stylophora digitata.

of bunches of elongate cylindrical zooids, whose proximal portions are united by solenia and compacted, by fusion of their own walls and those of the solenia, into a fleshy mass called the coenenchyma.

3) has very constant anatomical characters, differing in some important respects from the Actinian zooid, which has been taken as a type.

In other Entoprocta the buds on a horseshoe retain a high degree of individuality, a shaped l o p h o - thread-like stolon giving off the cylindrical phore; stalks, each of which dilates at its end i, Ectocyst; into the body of a zooid.

In Actinians the epithelio-muscular cells of the endoderm are crowded with yellow spherical bodies, which are unicellular plants or Algae, living symbiotically in the tissues of the zooid.

Dissemination is effected by the agency of water, of air of animals - and fruits and seeds are > therefore grouped in respect of this as hydrophilous, anemophilous and zooidiophilous.

- Part of the creeping stolon, with zooids, of Pedicellina belgica.

Synonyms:

being, organism,

Antonyms:

prokaryote, eukaryote, stander,