Exam 14: Chaetognaths, Echinoderms, and Hemichordates

Water for suspension feeding in the hemichordates is driven by ____________.

The respiratory tree of sea cucumbers opens into the ________________.

Echinoderms

A system of unknown function in echinoderms,consisting of tissue strands enclosing unlined channels is the ______________ system.

Of the echinoderms,regeneration and autotomy are most pronounced in the

The Chaetognatha appear to be morphologically similar to deuterostomes,but in fact may be __________________.

Characteristics of the hemichordates that are shared with the chordates are the ____________ and ______________.

The ophiuroids have no

Brittle stars move rapidly for echinoderms.

Minute,pincer like _________________ are found on the surfaces of many sea stars.

One of the principal functions of the tube feet in brittle stars is ___________.

The common name for the enteropneusts is _____________.

Acorn worms

The basic five arms of crinoids are usually branched to form many more,each of which bears barb-like _____________.

Combinations of characteristics only found in the Phylum Echinodermata are ossicles,water-vascular system,and pedicellarie.

It is generally accepted the ancestral deuterstome was a marine bilateral free-moving form with _____________.

Sea stars

The anus of asteroids is located on the aboral side of the animal.

The madreporite of asteroids leads directly the radial canals.

When a sea star feeds on a clam,it inserts its _____________ between the two valves.