The Alimentary canal has been divided into three main parts: Foregut Digestive System: It’s important to note that different types of diets require different systems, and a large amount of variation is present. The digestive system is involved in: 1. It starts with a mouth and ends with the anus.What goes on in between depends on the insect, its life stage and what it eats. The Drosophila intestine is a complex organ consisting of multiple cell types of heterogeneous developmental origin. Food is taken in with the beak, which is the perfect tool for pecking feed in crumble or pellet form, small grains, grass or insects. The digestive system is just a tube within a surrounding tube called the body. Structure of the Digestive Tract. Note the genital opening in Figure 22. PRESENTATION ON DIGESTIVE SYSTEM OF INSECT • By M. Furqan.Ali 2. Accessory organs such as the liver, pancreas, and gallbladder are also an important part of the digestive system of frogs. Let’s take a look at how the poultry digestive system works. Around 4,600 cockroaches are living aside human habitats. 4. digestive system functions to altered the chemical and physical composition of food so that it can be absorbed and used by the body; ie Functions of Digestive System: 1. physical and chemical digestion 2. absorption 3. collect & eliminate nonuseable components of food Human Anatomy & Physiology: Digestive System; Ziser Lecture Notes, 2014.4 2 Locust Dissection The Aim The aim of this dissection was to observe the gas exchange system of the locust. Obtaining food 2. Make incisions along the broken lines as indicated in Figure 22. This incision will detach the entire reproductive system form the rest of the animal (Figure 23). Insect Respiratory System: A complex of networked tubes known as a tracheal system Spiracles Spiracles are the valve like opening where air enters the body Spiracle Internal anatomy: Compared to us, the nervous system and circulatory system are reversed The hearts in the abdomen help pump the fluid forward into the aorta Gently separate the reproductive system from the digestive system. The specific features we were looking for were: The spiracles, closable holes in the abdomen and thorax of the insect in which oxygen enters the insect; Trachea, ribbed tubules of chitin which are attached to the spiracles DIGESTIVE SYSTEM 3. The digestion of food would take place in the cavities specialized or combined together. Even without teeth, chickens have one of the most efficient digestive systems in the animal kingdom. DIGESTIVE SYSTEM The digestive tract not only aids in obtaining, processing and digesting food molecules - It is the largest endocrine tissue in both humans and insects. 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