What are insects? • Insects are like arthropods because they have a segmented body, an exoskeleton, and jointed appendages • They have a body divided into three parts: the head, Thorax, and abdomen • Three pairs of legs are attached to the thorax
Uniramians • Insects, centipedes , and millipedes are all Uniramians • It is the group that contain more species than all other groups of animals alive today • Uniramians have jaws, one pair of antennae, and unbranchedappendages • They all have very different life styles
Centipedes • They have more than 100 pairs of legs, depending on the species. • They are carnivores whose mouths include a pair of venomous claws. • Centipedes usually live beneath rocks or in the soil, theses centipedes loose water fast because of their spiracles cannot close, therefore they cannot live in most humid areas.
Millipedes • have a highly segmented body but each millipede can bear two legs instead of one ( diego talk’s) • They live near dead logs and under rocks because they feed on dead plants. • if threatened they will roll up to a ball to protect themselves. • Some of them can release toxic chemicals when they feel in danger
jaw dropping facts about insects!!! (eyes) • Insects use a multiple set of sense organs on a everyday basis (eyes, taste, ears, touch, and smell)for example: • They have compound eyes that are made up of many lenses to detect change in movement and changes of color. • They see less detailed than us but they detect movement really fast therefore its hard to swat a fly.
Taste • They have chemical receptors for taste and smell on their mouth parts • They also have it on their antenna and legs so if they step on water it knows if it is made up of salt or if it contains sugar • They also have sensory hairs that detect movement when they fly or in water • Use saliva to break down their food
ears • they have very developed ears to hear sounds far above the human range • People think that bugs do not have ears because they cannot see it but most insects hear better then humans do.
Touch • Insects have three pairs of legs which depending on its species can be used to help for walking, jumping or capturing its prey. • They have hooks that are used for grasping and defense.
Reproduction • These insects grow and developed through a cycle called metamorphosis (Lester talks) • insects hatch nothing like their parents and feed completely different ways than adult insects. The larva forms into a pupa where the body is completely different and when it emerges it looks like another animal. Example (butterflies)
After metamorphosis • The cocoon hatches and turns the larva into a complete different animal. • Example the butterfly which is the most common • insects fly depending on their species cause some fly slow like butterflies or fast like flies or bees that can change their position and speed really fast. • A dragonfly can also reach speeds as fast as 50 kilometers an hour! • This is the circle of life for bugs.