Internal Insect Systems
(after John Meyer NC-State)
head
abdomen
thorax
circulatory
system
digestive
tract
nervous
system
brain
Insects have a ventral nerve chord (yellow) with nerve centers (ganglia) to control movement of each segment.
The digestive tract (green) goes through the center of the insect, with nutrient absorbtion occurs in the abdomen.
The circulatory system (yellow) open
Blood flows from the back to the front moving nutrients toward the brain.