TAMU ENTO 208 - Internal Anatomy (3 pages)

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Internal Anatomy

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Internal Anatomy


Basic internal anatomy of arthropods

Lecture number:
Lecture Note
Texas A&M University
Ento 208 - Veterinary Entomology

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ENTO 208 1st Edition Lecture 6 Outline of Lecture 5 I Evolution II Hexapoda a Insecta i Examples of individuals in insecta Outline of Lecture 6 I Internal Anatomy a Respiratory System b Circulatory System c Digestive System d Nervous System e Reproductive System f Endocrine System Current Lecture 6 I Internal Systems Grasshoppers are a good base to start with but as you move through the different organisms the internal anatomy varies greatly We will not go into as much depth with the internal anatomy as with the external II Respiratory system Carry oxygen to cells and remove carbon dioxide Spiracle take in oxygen from environment and transports it to the trachea Tracheae carry the oxygen to the tracheoles Tracheoles main site of gas exchange to muscles III Video Spiracles attach to tracheae tubes and carries O2 to the rest of the body the respiratory tissue also holds the internal structures together IV Circulatory system Transport nutrients hormones and waste products Assist in immunity Haemocoel body cavity used in open circulatory sytems Dorsal heart intake valves called ostia Pumps hemolymph to the anterior of the grasshopper via the aorta Hemolymph fills haemocoel These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute V VI Video VIII IX X Open circulatory system Dorsal vessel to carry blood Posterior heart Anterior aorta Digestive system Breakdown food and excrete waste products Foregut Proventriculus grinds food like the gizzard of birds Pharynx Crop storage Esophagus VII not red no hemoglobin does not carry O2 Video Hind gut Gastric caeca secretion of enzymes and absorption of water Ventriculus digestion and absorption Malpighian tubules remove waste from the body water salt small metabolites toxins wastes Rectum water salt and metabolite reabsorption Fat body stores fats Digestive system differs based on diet Fore mouth pharynx esophagus crop proventriculus Mid

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