OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they are colorful
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they look like stars in the sky
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firearms arranged around the center. They use their tube feet and push stomach out when they eat
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None of the above
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Detailed explanation-1: -It is these suction-bottomed tubes that the sea star uses to move about. It draws in water and channels it to canals that run throughout its body, usually ending in the tube feet. By changing the pressure of water in its body, the sea star can move the tubed feet, and thus move forward.
Detailed explanation-2: -At the tip of each tube foot is a small suction cup, which can be attached to objects. Tube feet enable the starfish to grasp and manipulate prey, to move, and to cling to rocks and other hard surfaces as it creeps along.
Detailed explanation-3: -The sea star has a feeding method unlike any other; it secures its prey with its tube feet and pries it open-like the shells of bivalve (clams and mussels are favorites!), and then ejects its stomach from its own body, placing it over the digestible parts of the prey.
Detailed explanation-4: -Tube feet function in locomotion, feeding, and respiration. The tube feet in a starfish are arranged in grooves along the arms. They operate through hydraulic pressure. They are used to pass food to the oral mouth at the center, and can attach to surfaces.