EVERYDAY SCIENCE

Detailed explanation-1: -A spider’s mouth parts, too, are different from an insect’s. Instead of mandibles capable of chewing, spiders have fang-tipped jaws called chelicerae. With these, they pierce their prey and inject a venomous fluid that immobilizes it. Digestive juices dissolve its internal tissues.

Detailed explanation-2: -Chelicerae are filled with muscles, and are used to hold prey while the spider injects venom.

Detailed explanation-3: -Systematic Relationships. Ticks are classified with the class Arachnida, the group that contains the familiar spiders and scorpions. Arachnids have chelicerae, which are appendages with pincerlike or scissorlike cutting edges, instead of mandibles. There is no head or thorax such as occurs in insects.

Detailed explanation-4: -Commonly referred to as “jaws", chelicerae may be shaped as either articulated fangs, or similarly to pincers. Some chelicerae, such as those found on nearly all spiders, are hollow and contain (or are connected to) venom glands, and are used to inject venom into prey or a perceived threat.

Detailed explanation-5: -The chelicerae are basically three-segmented pincerlike appendages; however, as a result of the diverse feeding habits of some mites, chelicerae sometimes are modified as piercing organs (stylets).