Endoparasites are found inside the host body. Mention the special structure possessed by these and which enables them to survive in those conditions.

(N/A) Endoparasites live in a nutrient-rich environment,so most of their adaptations help them in maximizing absorption.
The endoparasites such as $Taenia$ $solium$ (Tapeworm) and $Fasciola$ $hepatica$ (Liver fluke) are found inside the host body and survive due to the presence of certain characters:
$(1)$ They perform anaerobic respiration,and gaseous exchange occurs through the general body surface.
$(2)$ These organisms have additional organs for attachment to the host. $Fasciola$ $hepatica$ possesses an acetabulum or posterior sucker for attachment. $Taenia$ $solium$ possesses hooks and suckers for attachment to the host.
$(3)$ They are generally hermaphrodite,and self-fertilization is common in them.
$(4)$ $A$ thick tegument is present,which is resistant to the host's digestive enzymes and antitoxins.
$(5)$ Absence of locomotory organs.
$(6)$ Tapeworms lack digestive organs because the digested or semi-digested food of the host is directly absorbed through the body surface.