GENERAL HISTOLOGY

Detailed explanation-1: -Squid differ from cuttlefish in that they’re streamlined for open water living and have two tentacles that are longer than the others for seizing prey. Like jellyfish box jellyfish can swim and feed on plankton, but are weak swimmers.

Detailed explanation-2: -Mollusks display a wide range of morphologies in each class and subclass, but share a few key characteristics, including a muscular foot, a visceral mass containing internal organs, and a mantle that may or may not secrete a shell of calcium carbonate (Figure 1).

Detailed explanation-3: -All arthropods posses an exoskeleton, bi-lateral symmetry, jointed appendages, segmented bodies, and specialized appendages.

Detailed explanation-4: -Molluscs have a mantle or mass of soft flesh that covers the soft body and encloses the internal organs. In many species, the mantle produces a hard shell. Not all molluscs produce a shell. Many molluscs have a radula, which, in most species, is a rasp-like scraping organ used in feeding (Fig.

Detailed explanation-5: -What are two differences between the jellyfish and Ctenophores? Ctenophores lack the bag-like cnidarian body shape and they do not have Cnidocytes-stinging sells.