There should be enough room for the animal to move about easily.
Interpret the message the card gives you, and be conscious of the message as you move about your day.
Can he move about?
From this pole set out Oc to represent the velocity of the point C. The direction of this must be at right angles to the line CD, because this is the only direction possible to the point C. If the link BC moves without turning, Oc will also represent the velocity of the point B; but, if the link is turning, B can only move about the ax~., C, and its direction of motion is therefore at right angles to the line CB.
Some species, such as Myzostoma cirriferum, move about on the host; others, such as M.