Grasshoppers have the typical insect body plan of head, thorax and abdomen. The head is held vertically, at an angle to the body with the mouth at the bottom. It bears a large pair of compound eyes which give all-round vision, three simple eyes which can detect light and dark and a pair of antennae which are sensitive to touch and smell. The downward-directed mouthparts are modified for chewing and there are two sensory palps in front of the jaws.