Plasmodium has an intricate asexual life cycle in humans, while earthworms possess a basic digestive system.
Plasmodium enters humans through the bite of an infected female Anopheles mosquito, injecting sporozoites into the bloodstream. The sporozoites invade liver cells for asexual multiplication before moving to red blood cells, initiating the blood phase of infection.
Earthworms have a simple digestive system consisting of the mouth, pharynx, esophagus, crop, gizzard, intestine, and anus. The earthworm ingests soil, passes it through its digestive tract, absorbs nutrients, and eliminates waste through its anus.
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