spiders ryan.steve.reid.schaeff
TRANSCRIPT
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