The Grasshopper: the digestive system Grasshoppers feed on plants so their mouthparts are modified for cutting & chewing plant materials The labrum & labium are mouthparts that function as upper & lower lips They hold the food in place so the sharp mandibles & maxillae can cut it
The food is moistened by saliva, passes through the esophagus & into the crop for temporary storage The digestive system The food then pass into the gizzard where it is ground & shredded & is pushed into the midgut In the midgut, enzymes are released to digest the food & nutrients are absorbed
Undigested matter enters the hindgut & leaves the body QuickTime and a TIFF (LZW) decompressor are needed to see this picture. The Grasshopper: Circulatory system Nutrients are transported through the body of a
grasshopper by an open circulatory system Hemolymph (blood) flows through a large dorsal vessel called the aorta The heart is located in the abdomen & thorax pumps the hemolymph towards the head where it slowly moves through a sieve like structure called a coelom The hemolymph then slowly makes its way back to the heart to be recirculated
QuickTime and a TIFF (LZW) decompressor are needed to see this picture. The Grasshopper: nervous system The central nervous system consists of a brain & a ventral nerve cord with ganglia located in each body segment Ganglia are small nerve centers that control each
segment & boost signals from the brain In the head, nerves extend from the brain to the sensory organs: Antennae: touch & smell Simple eyes: measure light intensity Compound eyes: composed of hundreds of lenses provide a wide field of vision & detect motion Other nerves extend from the segment
ganglia to the muscles The abdominal ganglia connects to a sound sensing organ called the tympanum It is an oval window found on the first abdominal segment which is hollow & full of air Sounds cause the tympanum to vibrate, sending a signal to the nearby nerves that are interpreted as sound
QuickTime and a TIFF (LZW) decompressor are needed to see this picture. The grasshopper: The reproductive system Grasshoppers have both male & female sexes The males deposit sperm into the females seminal repository where it is stored until needed When the female is ready to lay her eggs, the sperm
is released into the abdomen where the eggs are fertilized She then uses a pointed structure at the end of her abdomen called an ovipositor to dig a hole in the soil where the fertilized eggs are deposited Incomplete Metamorphosis When grasshoppers are hatched, the infants are known as nymphs The nymphs look like tiny grasshoppers &
over time grow into adult grasshoppers QuickTime and a TIFF (LZW) decompressor are needed to see this picture. Complete Metamorphosis This is where an immature insect is hatched but looks nothing like the adult At a certain point in its life cycle, it spins
a cocoon, & goes into a pupate stage where the insect completely changes (metamorphoses) body style This is the method used by butterflies QuickTime and a TIFF (LZW) decompressor are needed to see this picture. QuickTime and a
TIFF (LZW) decompressor are needed to see this picture. The Metamorphosis is complete! QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture.
QuickTime and a TIFF (LZW) decompressor are needed to see this picture. QuickTime and a TIFF (LZW) decompressor are needed to see this picture. QuickTime and a TIFF (Uncompressed) decompressor
are needed to see this picture. QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture.
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