ambulacrum


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ambulacrum

(ăm′byə-lăk′rəm, -lā′krəm)
n. pl. ambu·lacra (-lăk′rə, -lā′krə)
One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

am′bu·lac′ral adj.

ambulacrum

one of the five radial bands on which tube feet occur on the outside surfaces of ECHINODERMS.
References in periodicals archive ?
The "low side" is opposite this and is centered near ambulacrum I (e.
This relative displacement is linked with the balance between the anterior and posterior parts of the test (manifested in the multiplication of the plates in ambulacrum III).
The "relative size" of a plate pair was defined as the area of the plate pair, divided by the area of the plate pair in ambulacrum III of the same specimen.
Tube foot movements during burrowing involve bending away from the ambulacrum toward the sides of the arm.