reliable reference information to help answer these
about Lumbriculus regeneration:
1) In nature, what circumstances could
suddenly cause a whole worm to break into two or more worm fragments?
2) In newly regenerating head or tail
segments, what organ systems must develop and eventually make
functional connection with organ systems in the original
3) How many
new head segments usually regenerate in this species?
How could you determine which is the anterior end, and which is the
posterior end, in a small worm fragment that has not yet regenerated new
Diagram of Lumbriculus
Experiments with Lumbriculus
Those Wonderful Worms
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