Bilateria and Acoelomate Animals

Most animals have ______ symmetry.

Animals with bilateral symmetry have a distinct ______ end.

Animals that have no space between their gut and body wall are said to be ______.

Acoelomate phyla belong to the superphylum ______.

Members of phylum Platyhelminthes live in ______, freshwater, and damp terrestrial habitats.

These are the simplest animals with an ______ system.

The epidermis contains cellular ______ with rhabdites

Platyhelminthes are flattened ______ and have a gastrovascular cavity

Undigested food is ______ through the pharynx

The osmoregulatory system consists of ______ with flame cells

The nervous system consists of a ladderlike network of ______ and a bilobed brain

Some species of Platyhelminthes can reproduce ______ as well as sexually

Most flatworms are ______ (hermaphroditic) during breeding season.

In males, there are two or more ______ with papilla-like penis or cirrus.

Class Turbellaria consists of mostly ______ turbellarians.

Planarians have ______ eyespots and centralized nerve nets.

Trematodes live as ______ in or on other animals.

Flatworms are divided into four ______: Turbellaria, Trematoda, Monogenea, and Cestoda.

The class Trematoda has approximately ______ known species.

The subclass Apidogastrea are obligate parasites of ______ and some vertebrates including cartilaginous fish.

The body surfaces of Trematoda comprises a tough ______ tegument.

Schistosomiasis affects approximately ______ people in 74 countries.

The transmission of Schistosomiasis occurs in ______ water.

Adult worm of S.haematobium live in the veins that drain the ______ system.

S.haematobium cercaria are viewed using ______ microscopy

Schistosoma eggs become trapped in the tissues of the ______ tract

Adult worms of S.haematobium are ______ cm long

Tapeworms are also ______ and lack a digestive system

The scolex is equipped with ______ and hooks for attachment to the host

Cestodes usually require at least ______ hosts