Moulting:
A spider has to moult as it grow and ages because it's body is made from an exoskeleton and this is unable to expand as the spider grows, the exoskeleton is the name for hard armoured skin so for the spider to grow it sheds its exoskeleton and then the new exoskeleton comes out and starts become hard. The new exoskeleton is kept under the old one, now a lot of people are going "huh???". The old and new exoskeleton are kept apart by air to stop them from joining, and as the old hard exoskeleton breaks the new one will start to push out and because its not hard but elasticised it forms around the spider and stretches over the body before hardening off to form the hard new exoskeleton.
The moulting is started with the spider attaching its self to a vertical surface with silk and then the spider hangs on a draggling. The carapace splits open and then goes along one side from the cephalothoraxes to the abdomen and then opens almost hinged like.
The spider starts to exit legs first and then pushes the rest of his body, after this the spider will rest for a period of time, this could be a few minutes or it could be over a day or two.
During the time of moulting the spider should be left alone as it might result in the spider being hurt or the exoskeleton being damaged. If the spider is undernourished then this could kill the spider or stop the spider from moulting probably and the old exoskeleton might not shed or the new one won't harden properly.
A spider moults all its life but during the early years of its life its moults a lot as its growing, when the male reaches its final moult the fangs and sex organs become larger and that's the final moult and the male is sexually mature.
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