Anthropods

The answer to the crunching sounds in insects

Objectives

Background

  • Taxonomy

Arthropods include insects, arachnids, and crustaceans. An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages.

Kingdom: Animalia

Subkingdom: Eumetazoa

  • Evolution

Arthropods that swim in water could venture on land becayuse they had the capability to store water in there exoskeleton. Arthropods like grasshoppers, have jointed legs that gives a strong jump.

  • Ecology

Many arthropods lives flatwoods, Bayheads and pastures. Bigger birds like an eagle or hawks can eat arthropods. Preys of arthropods are smaller arthropods and rodents like mouse. Arthropods can be in 2nd trophic levels as primary consumers. Arthropod's niche are almost all around the world due to their great diversity. a symbiotic relationship between a grasshopper and a leave is predation.

Arthropod Cladogram

http://www.trilobites.info/triloclass.htm

Population Density

http://www.agnet.org/library.php?func=view&style=&type_id=4&id=20110712183243&print=1

Organs of Grasshopper

http://alexalex.wikispaces.com/Excretory+System

Functions

Brain- thinking

Aorta- supply all arteries with oxygenated blood

Crop- store excess food for later consumption.

Gastric- increase the surface area of the midgut, which helps in digestion

Stomach- breaks down food

Esophagus- connects the pharynx (throat) with the stomach

Intestines- digest nutrients

Malpighian tubules - gets rid of grasshopper's nitrogenous waste

Ovary- contain eggs

Heart- pumps blood

Rectum- muscular ring that is at the end of the large intestine

Anus- location where waste leaves the body

Ovipositor- lays eggs

External Structure

http://keys.lucidcentral.org/keys/grasshopper/nonkey/html/Main/Labeled%20Sketch.gif

Grashopper External Labeled

Head- includes the brain and mouth, protection

Pronotum- protection behind the head

Abdomen- protects the heart and reproductive organs

Antenna- communication

Lateral Foveola- top part of head

Median Carina- top part of the pronotum

Wing- allows for flight

Knee- allows the grasshopper to exert strong force to bounce

Furcula- contains the anus

Subgenital Plate- plate of the abdomen

Tibia- allows for grasshoppers to have a strong bone

Cercus- paired appendages

Femur- support entire skeletal structure

Where to find them?

Grasshoppers, spiders, and other insects can be found in your backyard camouflaging.

http://3.bp.blogspot.com/-SVwFhOAzCrY/T72oqALoQ2I/AAAAAAAAGHc/MAN4RUpc850/s1600/green_grasshopper_1200x900.jpg

Amazing Facts

  • Even though most of the arthropods lay eggs, in scorpions, the eggs hatch inside the female's body and it gives birth to young ones.
  • Arthropods are subjected to a biological process referred to as metamorphosis, wherein their body form and physiology undergo a radical transformation from egg stage to larva, pupa, and adult state.

  • Each of the segments of an arthropod's body is specially designed to facilitate particular functions, including feeding, sensory perception, visceral functions, etc.
  • While internal fertilization is common in arthropods, some aquatic arthropods undergo external fertilization.

http://www.buzzle.com/articles/arthropods-facts.html

INTEGUMENTARY SYSTEM OF ARTHROPODS

Arthropods are invertebrates that have an exoskeleton. The exoskeleton is their integumentary system. The skin is hard, and made up of a tough polymer called Chitin. The exoskeleton has four layers, namely epicuticle, procuticle, epidermis and basement membrane. The topmost layer, or the epicuticle, serves to lock in water, while the procuticle is the layer that gives strength to the exoskeleton. The third layer, or the epidermis, is responsible in secreting the procuticle. The exoskeleton has one disadvantage. It does not grow with the rest of the body. So, it has to molt or shed its skin when it gets too small for the body.