Studying HARD with Arthropods

Arthropods Dissection, PRE-AP BIOLOGY, RACHEL LU


In this Digital Lab we will be learning all about two arthropods, and about arthropods in general. The two arthropods that is going to be covered is the grasshopper and the crayfish. The system that is identified is the integumentary and the respiratory system, but in this case we will go over the integumentary (external anatomy) system.

Home Sweet Home

Grasshoppers are found all around the world, as long as they are in approximate distance to grassy areas such as meadows, forests, or woodlands. Even though they live in many different areas, they will get up and migrate to another location when winter comes. Crayfish are distributed widely throughout the globe, but in the United States of America the crayfish resides there in mass amounts. They can dwell in lakes, streams, rivers, ponds, and other bodies of water. They usually hide or live under submerged rocks, logs, branches, and other debris found in the water.

Trying HARD to fit in

Both arthropods have adaptations that have allowed them to thrive in their environment. The grasshopper has specialized hind legs that allow them to jump abnormal lengths. This is an adaptation, because grasshoppers do not have many defense mechanisms, so it leaps forward at a rapid speed so that a predator cannot catch it nor can it catch up to it. Grasshoppers also have chemical receptors in their antenna which allow them to find food faster. They cannot walk properly, so having antenna's allow them to conserve their energy and reduce the time spent wandering around looking for food. Crayfish have eyes that are on short stems, allowing their eyesight range to increase drastically. Like the grasshopper, crayfish have sensitive antennae that detect movement and chemicals which help them in finding food. Their coloring allows them to stay hidden because it is used for camouflage.

Two sides to a sad story

Human impact as effected the grasshoppers because as the forestland and grasslands are being destroyed, the grasshoppers homes are also being destroyed. Also many times farmers view them as pests because they feed off of their crops, so they have them exterminated from their land. This is all causing the decrease of the population. Crayfish are strong animals, but even the strong will fall. Some crayfish are going extinct because of human activity, and destruction of homes. Most human impact are not good to the environment, and therefore not good for the animals that have to live there.
America's Crayfish: Crawling In Troubled Waters
Grasshopper Anatomy Part 1