Feeding
In the phyum Arthropoda has every mode of feeding is seen from carnivores (ex. spider, scorpion), herbivores (ex.ants, butterflies), parasites(ex. ticks, lice), filter feeders (ex. barnacles) and detritus feeders. Each type of preditors have had their appendages evolved in diffrent ways to suit their enviorment like mouth parts.
Digestion
Due to the fact that there are millions of arthropods that live in diffrent habbitats and feed on diffrent things the digestive tract varies for each animal. An example of a digestive tract would be the grasshopper, where food enters the mouth and then is leaded to esophagus, pharynx, crop (where food is stored), intestine, rectum and food is then excreted through the anus.
Excretion
-Solid undigested food is excreted through the anus
Terrestrial arthropods
-deposite nitrogen-containing waste(from cellular metabolism)
-removed by using a set of Malpighian tubules (located in the body sinuses)
-remove waste from blood, concentrates it, and is then mixed with the undigested therfore it is now solid and removed through the anus
-some have small excretory glands at bases of legs instead/in additon of malpighian tubules
Aquatic arthropods
-deposite nitrogen-containing wastes
-by a pair of green glands found by base of antennae it is then emptied through a pair of opening on the head
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