Monoclonal antibodies to treat cancer. One way the immune system attacks foreign substances in the body is by making large numbers of antibodies. An antibody is a protein that sticks to a specific protein called an antigen.Antibodies circulate throughout the body until they find and attach to the antigen.ne way the immune system attacks foreign substances in the body is by making large numbers of antibodies. An antibody is a protein that sticks to a specific protein called an antigen. Antibodies circulate throughout the body until they find and attach to the antigen.
The average weight is 6 to 10 pounds, but king crab can grow to more than 20 pounds. Unlike other crabs, king crabs have only six legs versus eight legs, and two claws. The body or carapace section of king crabs is typically sent to canners while the legs are separated and served individually.
The horseshoe crab is a living fossil. It has been on Earth some 220 million years, longer than dinosaurs. And it survives today almost identical to its ancient ancestors. Horseshoe crabs get their name because their arc shaped carapace, or exoskeleton, has been compared to the shape of a horse's shoe. Their body is divided into three sections, the first of which contains their mouth, a pair of feeding pincers and five pairs of legs.