Book lungs.
Mitochondria is the cellular structure that is responsible for circulation. Mitochondria are surrounded by a membrane and are present in most eukaryotic cells.
Stomates are responsible for most of the gas exchange that occurs in a plant.
Suprachiasmatic nucleus
The Cell Membrane
Spiders are most likely to eat bugs
Mass media and migration
most Spiders have 8 eyes
Jumpimg spiders, wolf spiders, fishing spiders, cobweb spiders, barn spiders, cellar spiders, funnel spider (grass spider), garden spider.
Both some birds and most spiders eat insects and spiders.
cat in the hat rules me cool you wierd
no most spiders live in webs or in trees
Tracheal tubes are used by most terrestrial arthropodsBook lungs are used by spiders and othersFeatherlike gills are used by most aquatic arthropodsBook gills are used by Horseshoe crabs