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INSECT ANATOMY AND
PHYSIOLOGY
INSECT ANATOMY AND
PHYSIOLOGY
GENERALIZED INTERNAL ANATOMY
GENERALIZED INTERNAL ANATOMY
INSECT STRUCTURE AND FUNCTIONINSECT STRUCTURE AND FUNCTION
INSECT INTERNAL ANATOMYINSECT INTERNAL ANATOMY
Heart and Dorsal AortaHeart and Dorsal Aorta
Ventral Nerve ChordVentral Nerve Chord
Spiracles and TracheaSpiracles and Trachea
Foregut, Midgut, HindgutForegut, Midgut, Hindgut
Brain and Associated GangliaBrain and Associated Ganglia
Malpighian TubulesMalpighian Tubules
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
INSECTS HAVE A “COMPLETE” DIGESTIVE SYSTEM
INSECTS HAVE A “COMPLETE” DIGESTIVE SYSTEM
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
INSECT ALIMENTARY CANAL IN CROSS SECTIONINSECT ALIMENTARY CANAL IN CROSS SECTION
““Tube Within A Tube”Tube Within A Tube” DesignDesign
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
THE INSECT THE INSECT ALIMENTARY CANAL ALIMENTARY CANAL
IS DIVIDED INTO IS DIVIDED INTO THREE (3) THREE (3)
FUNCTIONAL FUNCTIONAL REGIONS:REGIONS:
FOREGUT (STOMODEUM)
MIDGUT (MESENTERON)
HINDGUT (PROCTODEUM)
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
THE FOREGUT AND THE FOREGUT AND HINDGUT ARE OF HINDGUT ARE OF
ECTODERMAL ECTODERMAL ORIGIN AND LINED ORIGIN AND LINED WITH A THIN LAYER WITH A THIN LAYER
OF CUTICLEOF CUTICLE (THE INTIMA)(THE INTIMA)
FOREGUT (ECTODERM)
MIDGUT (ENDODERM)
HINDGUT (ECTODERM)
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
THE MIDGUT IS OF THE MIDGUT IS OF ENDODERMAL ENDODERMAL
ORIGIN AND ORIGIN AND LACKS A PROTECTIVE A PROTECTIVE
LAYER OF CUTICLELAYER OF CUTICLE
MIDGUT (ENDODERM) EPITHELIAL CELLS
SECRETE A PROTECTIVE BARRIER
THE PERITROPHIC MEMBRANE
LOCATION AND MAJOR STRUCTURES OF THE FOREGUT, MIDGUT, HINDGUT
LOCATION AND MAJOR STRUCTURES OF THE FOREGUT, MIDGUT, HINDGUT
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
COMPLEX COMPLEX MOUTHPARTS MOUTHPARTS
PROVIDE INITIAL PROVIDE INITIAL FOOD FOOD
MANIPULATION AND MANIPULATION AND PROCESSING PROCESSING
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
SALIVARIUMSALIVARIUM
SALIVARY DUCTSALIVARY DUCT
SALIVARY GLANDSALIVARY GLAND
SALIVARY GLANDSSALIVARY GLANDS
MOISTEN AND LUBRICATE MOUTHPARTS, DISSOLVE FOOD,
INITIATE DIGESTION
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
SALIVARY GLANDSSALIVARY GLANDS
Silk Moth (Bombyx mori)Silk Moth (Bombyx mori)
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
HYPOPHARYNXHYPOPHARYNXHYPOPHARYNXHYPOPHARYNX
THE HYPOPHARYNX IS A TONGUE-LIKE STRUCTURE WHICH AIDS IN THE INITIAL MANIPULATION AND
MIXING OF FOOD.
THE HYPOPHARYNX IS A TONGUE-LIKE STRUCTURE WHICH AIDS IN THE INITIAL MANIPULATION AND
MIXING OF FOOD.
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
AN INSECTS MOUTH IS LOCATED AT THE BASE OF THE MOUTHPARTS AND SERVES AS A MUSCULAR VALVE FOR FOOD
INGESTION
AN INSECTS MOUTH IS LOCATED AT THE BASE OF THE MOUTHPARTS AND SERVES AS A MUSCULAR VALVE FOR FOOD
INGESTION
CIBARIAL MUSCLES – “CIBARIAL PUMP”
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
STOMODEUM (FOREGUT)STOMODEUM (FOREGUT)
PHARYNX
ESOPHAGUS
CROP
PROVENTRICULUS
CARDIAC VALVE
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
MESENTERON (MIDGUT)MESENTERON (MIDGUT)
GASTRIC CAECAE
PERITROPHIC MEMBRANE
PYLORIC SPHINCTERVENTRICULUS
Digestion and Nutrient Absorption
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
MIDGUT GASTRIC CAECAE PROVIDE
SITES FOR SYMBIOTIC BACTERIA,
PROTOZANS, AND OTHER ORGANISMS
MIDGUT GASTRIC CAECAE PROVIDE
SITES FOR SYMBIOTIC BACTERIA,
PROTOZANS, AND OTHER ORGANISMS
GASTRIC CAECAEGASTRIC CAECAEGASTRIC CAECAEGASTRIC CAECAE
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
PROCTODAEUM (HINDGUT)PROCTODAEUM (HINDGUT)
RECTAL PADS
MALPIGHIAN TUBULES
ILEUM
COLON
WATER RETENTION and
WASTE ELIMINATION
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
INSECT FECAL MATERIAL IS CALLED “FRASS” INSECT FECAL MATERIAL IS CALLED “FRASS”
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
THE INSECT ALIMENTARY CANAL
HAS PRODUCED A DIVERSITY OF
CONFIGURATIONS TO FACILITATE
SPECIALIZED FEEDING AND
DIGESTION REQUIREMENTS
THE INSECT ALIMENTARY CANAL
HAS PRODUCED A DIVERSITY OF
CONFIGURATIONS TO FACILITATE
SPECIALIZED FEEDING AND
DIGESTION REQUIREMENTS
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
HINDGUT SYMBIONTS HINDGUT SYMBIONTS
FLAGELLATE PROTOZOAN
SPIROCHAETE
TERMITE WORKER (ISOPTERA)
SYMBIOTIC BACTERIA, PROTOZANS, SYMBIOTIC BACTERIA, PROTOZANS, AND OTHER MICRORGANISMS AND OTHER MICRORGANISMS
ASSIST IN DIGESTION AND CRITICAL ASSIST IN DIGESTION AND CRITICAL NUTRIENT PRODUCTION NUTRIENT PRODUCTION
SYMBIOTIC BACTERIA, PROTOZANS, SYMBIOTIC BACTERIA, PROTOZANS, AND OTHER MICRORGANISMS AND OTHER MICRORGANISMS
ASSIST IN DIGESTION AND CRITICAL ASSIST IN DIGESTION AND CRITICAL NUTRIENT PRODUCTION NUTRIENT PRODUCTION
TERMITE HINDGUT
INSECT DIGESTIVE SYSTEMINSECT DIGESTIVE SYSTEM
INSECT ALIMENTARY CANAL AND DISEASE TRANSMISSION
INSECT ALIMENTARY CANAL AND DISEASE TRANSMISSION
INSECT EXCRETORY SYSTEMINSECT EXCRETORY SYSTEM
MALPHIGIAN TUBULESMALPHIGIAN TUBULES
INSECT EXCRETORY SYSTEMINSECT EXCRETORY SYSTEM
MALPHIGIAN TUBULESMALPHIGIAN TUBULES
LONG, SLENDER HINDGUT FILAMENTS WHICH FILTER WASTE
PRODUCTS AND TOXINS FROM THE
HAEMOLYMPH
LONG, SLENDER HINDGUT FILAMENTS WHICH FILTER WASTE
PRODUCTS AND TOXINS FROM THE
HAEMOLYMPH
INSECT EXCRETORY SYSTEMINSECT EXCRETORY SYSTEM
MALPHIGIAN TUBULESMALPHIGIAN TUBULES
