ARACHNIDA(arthropoda)

By Dan M and Myles

Characteristics of Arachnids

• Kingdom: Animalia

• Phylum: Arthropoda

• Class: Arachnida

CHARACTERISTICS

• Characteristics of a typical arachnid include:

- Four pairs of legs (8 legs total)- Four pairs of eyes (8 eyes total)- They have a cephelathorax (a head and thorax fused together)- They don’t have antennas - They perform respiration via book lungs

ORGANISMS

• Some organisms that are found in the arachnida class are:

- Spiders

- Ticks

- Scorpions

ORGANISIMS

• SPIDER SCORPION TICK

• Kingdom: Animalia Animalia Animalia

• Phylum: Arthropoda Arthropoda Arthropoda

• Class: Arachnida Arachnida Arachnida

• Order: Araneae Scorpiones Ixodida

• Family: Theridiidae Vaejovidae Ixodidae

• Genus: Latrodectus Vaejovis AmblYomma

• Species: L. hesperus V. brysoni A. ovale

• A. ovale

• L. hesperus

• V. brysoni

DIAGRAM OF A SPIDER

-Uses 8 legs to move around

-Gets food by trapping it

in a web

-Can spin webs by

using a special silk

gland

-Can kill prey by using it’s

Poisonous fangs

(females only)

ANATOMY OF A SPIDER- Spiders transport nutrients and oxygen by circulating blood through their bodies- Most arachnids lack muscles in their legs, so they move their legs hydraulically by

using the blood pressure in their legs

ANATOMY OF A SPIDER

- Spiders exchange gases using an organ called a Book-Lung

- A book lung is made of several air pockets surrounded by blood filled tissues

- Spiders use book lungs to perform respiration

ANATOMY OF A SPIDER

- Spiders can not eat their food in solid form

- When a spider catches its prey, it turns it into a liquid by using digestive juices produced in its stomach

- The spider sucks up the liquid remains and absorbs its nutrients

LIFE CYCLE- An infant arachnid will hatch from an egg- The infant arachnid grows up into an adult- The adult arachnid will eventually find a mate- An adult male will transfer sperm to a female- Female lays eggs- New arachnids hatch from eggs

FUN FACTS

-Almost all arachnids are carnivores

-Spiders eat more insects than birds and bats combined, and play a big role in insect population control

-Spiders can regenerate lost limbs, just like reptiles

BIBLIOGRAPHY

-http://en.wikipedia.org/wiki/Arachnid

-http://www.britannica.com/EBchecked/topic/448491/pedicel

-http://www.spiderzrule.com/spider8.htm

-http://www.berghuis.co.nz/abiator/unit/science/spiders/spi4.html

-http://atshq.org/articles/Respiration.pdf