The cestodes, or tapeworms found in humans, all have a flat, ribbon like body. 

They inhabit the small intestine and are attached to the mucosa by means of a scolex.

 The body consists of a chain of segments or proglottids. 

The proglottids can be immature, mature or gravid the latter of which contain a fully developed uterus full of eggs.

 Tapeworms do not have a digestive system and they absorb food from the hosts intestine

.  The lifecycle of tapeworms involves both an intermediate and definitive host.

The tapeworms which affect man are Taenia species, Diphyllobothrium latum , Hymenolepis nana , Hymenolepis diminuta and Echinococcus granulosus.

Bertiella studeri is a monkey tapeworm that may also affect man