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The image displays a diagram titled "Life cycle of a nematode worm". The central circular diagram, labeled "Nematode Worm Life Cycle", illustrates the following stages: An adult worm inside a sheep undergoes Stage 3-5 development within the sheep intestine. Eggs are then dropped in faeces onto grassland. The eggs embryonate in five days. The embryo hatches into Larvae Stage 1, which remains in the faeces. This moults and grows into Larvae Stage 2, also in the faeces. It moults again to become Larvae Stage 3, which leaves the faeces and attaches to grass. A sheep eats the worm, completing the cycle. An additional note states that Stage 3 larvae may survive for up to one year on grass. Definitions are provided for 'Faeces' (solid waste material that leaves the body through the anus) and 'Moult' (remove outer layer of skin in order to increase body size).
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram illustrates the life cycle of a parasitic worm species known as nematodes.
Overall, the biological process can be divided into several stages, beginning with the release of eggs in the sheep’s faeces and ending when the adult worm inside the animal produces eggs.
At the beginning of the cycle, eggs are passed out of the sheep’s body through its faeces and dropped onto the grass. After about 5 days, these eggs develop into embryos and then hatch into the first larvae stage, which remains in the sheep’s faeces. In the next stage, the larvae moult and increase its size, becoming stage-two larvae while still in the same place.
Regarding the remaining stages of the cycle, the larvae then moult again and reach the third larvae stage, which allows them to leave the faeces and attach to grass. When sheep eat worms, the larvae enter the sheep’s intestine and continue to grow until they become adult worms. Finally, these mature worms then lay eggs, which leave the body through the sheep’s waste, and the cycle starts over again.
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