An Astounding Arthropod Dissection

Jamie Lu Mitcham- Pap-Bio-6th period


The objectives of this lab are too

  1. To recognize 2 different arthropods (crayfish and grasshopper)
  2. Distinguish their organs and functions.
  3. Look for similarities and differences between the two organisms.

Background Information

Since there are two arthropods we will start with the grasshopper, or better known as the Califera. The scientific name will depend the name. They live around the world wherever there is grass, over the seasons when it gets too cold they migrate to warmer areas. The Califera's average length is around 2 inches long, they eat leaves, grasses, and small shrubs. It's predators are lizards, birds, and small rodents. The crayfish is known as the astacoidea is another arthropod. They are found in almost anybody of freshwater as long as it is not polluted such as lakes, ponds, and . They can grow up to around 2-3 inches. The astacoidea is an omnivore it consumes worms, insects, and insect larvae. Their niches are to provide food sources to other animals as well as keeping other insect populations in check.

Evolution of Arthropods

Dissection Photos

Internal and External Anatomy

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Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta+Maxillopoda

Order: Decapoda+Orthoptera

Family: Cambridae+Archrididae.

Genus: Cambarus+Cholealtis

Species: Cambrus Brouchardi

HIGHLIGHT: Integumentary System

Integumentary System Organs

  1. Head: Main vision and processing center, contains sensory nerves and brain.
  2. Exoskeleton: Hard outer covering that protects internal organs and predators.
  3. Thorax: This is the site where the wings are attached as well as the legs. Makes up most of the body.
  4. Abdomen: Segment of the arthropod containing the circulatory, digestive, and reproductive organs.
  5. Legs: Enable huge leaping and jumping.
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Integumentary System Overview

Most, if not all Arthropods have a thick exoskeleton. Their exoskeleton is hard and formed by chitin, the exoskeleton protects the soft interior organs of the grasshopper. The exoskeleton preforms almost the same as the humans, it provides protection The grasshopper 3 pairs of jointed legs, 2 pairs of wings, 2 antennae, and 3 body segments. The head, thorax and abdomen. The crayfish has 4 pairs of jointed legs, 3 body segments, a pair or chelapid. And finally a telson.

Interesting Facts

  1. There are over 11,000 kinds of grasshoppers.
  2. They go through three stages of development.
  3. The sound created is by the rubbing of their legs
  4. There are around 350 species of crayfish in the U.S
  5. Crayfish are delicious.

Work Cited