How Do Spiders Release Venom?
Spiders release venom by injecting it into their prey. A variety of strategies are used to do this. Some species use a silk apparatus, while others use fangs. The effects of a spider bite vary depending on the health of the bitten person, as well as the species.
Venom consists of a complex cocktail of chemicals. Some of these chemicals are harmless, while other toxins are deadly. In some cases, spiders deliver multiple doses of the poison at once.
The composition of a spider’s venom will vary according to the species and the age of the venom-delivering spider. In general, most spider venoms are neurotoxins. They cause local tissue damage and can be fatal. This effect is mediated by a cytotoxic hyaluronidase-like enzyme. This enzyme enhances uptake of the neurotoxins. It also causes cell membrane degradation and may lead to hemolysis of red blood cells.
A few spiders, such as the brown recluse, have a complex venom system. They have a venom gland embedded in muscles, which is connected to a narrow duct leading to the fangs. The gland is attached to a basal segment, which forms a mobile base for the fang. This segment is also attached to the prosoma.
A spider’s venom gland can be divided into subsections, each producing different venom compounds. These venom compounds include inorganic ions, small molecules, free amino acids, and larger proteins. Some of these larger proteins are used to spread the venom and some disrupt the physiology of the prey.