On the Inner End of Each Tube Foot Is a Muscular

question 3

Short Answer

On the inner end of each tube foot is a muscular sac called an ______________.

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Definitions:

Withdrawn Behavior

A type of behavior characterized by a significant reduction in interaction with others and the external world.

Development

Qualitative or observable aspects of the progressive changes that one makes in adapting to the environment.

Cephalocaudal

A principle of development describing the pattern in which growth occurs from the head downwards through the body.

Proximal-distal

A pattern of development or movement that starts from the center or core of the body and moves outwards to the extremities.