spiders ryan.steve.reid.schaeff

SpidersRyan BahadursinghSteven CharmelloAndrew SchaefferReid Budrovich

Classification

Kingdom: Animalia Phylum: Arthropoda Class: Arachnida Order: Araneae Family: Theridiidae Genus: Latrodectus Species: Hesperus

Body Plan

Segmented Joined limbs Heads are composed of several

segments that fuse during the development of the embryo

Cephalothorax and abdomen are connected by a small cylindrical section, the pedicel

Habitat

Spiders live in many different environments

They can be found in the desert, rainforest, and even your backyard

Predators

Birds Toads Monkeys Lizards

Competitors

Spiders are small and spend more time protecting themselves rather than fighting other animals

Males compete against each other for females

Food

Spiders mainly trap food in their webs and eat flies and small bugs

Other, larger species may hunt small birds or lizards

Structures & Functions

8 Legs: Allow for easy mobility Move quickly and agile Navigate and hide on the webs they

spin

Reproduction

Spiders reproduce sexually Fertilization is internal but indirect

Circulatory System

Spiders have an open circulatory system

Their blood flows through veins and arteries and is released into open cavities around the organs

Respiration

Spiders have developed different respiratory anatomies: book lung, a tracheal system, or both

Two pairs of book lungs where openings on the ventral surface of the abdomen allow air to enter and diffuse oxygen

Tracheal tubes are found less often but fuse together to form spiracles

Interesting Facts

Webs Many shapes, sizes & colors 8 legs http://

www.youtube.com/watch?v=pBkhQOYArxg&feature=related