Digestuve system part two of 3rd quarter.pptx

POWERPOINT PRESENTATION IN DIGESTIVE SYSTEM (GRADE 8)

1. THE DIGESTIVE SYSTEM

2. LEARNING OBJECTIVES Identify the organs that make up the digestive system; At the end of the lesson, students should be able to: Give the function of each organ; Describe how some accessory organs and glands help the body in the digestive process; and Explain ingestion, digestion, absorption, assimilation, and excretion.

3. DIGESTIVE SYSTEM The organs that take in food and liquids and break them down into substances that the body can use for energy, growth, and tissue repair. Waste products that body cannot use, leave the body through bowel movements.

4. Organs that make up the Digestive System MOUTH The mouth initiates digestion before eating, with salivary glands activating. Food is chewed into easier pieces, and saliva breaks down into a digestible form. The tongue then passes the food into the throat and esophagus.

5. ESOPHAGUS The esophagus , located near the trachea, receives food from the mouth through the epiglottis, preventing choking, and peristalsis, a series of muscular contractions.

6. STOMACH The stomach , a hollow organ, holds food and breaks it down with enzymes. Cells secrete acid and enzymes, releasing contents into the small intestine after processing.

7. The small intestine is an organ that breaks down food further into substances, such as glucose, that can be absorbed by the villi. It has three parts namely the duodenum, the jejunum, and ileum. SMALL INTESTINE

8. This is where reabsorption of liquid, electrolytes and some vitamins from the undigested food takes place. It secretes mucus to aid in the formation of feces and maintains alkaline conditions. This is the last segment of the gastrointestinal tract that completes absorption and compacts waste. LARGE INTESTINE

9. . The pancreas makes three different kinds of enzymes namely amylase, peptidase, and lipase released through a pancreatic duct that aid in the digestion of all three organic compounds such as carbohydrates, proteins, and fats respectively. PANCREAS

10. . The liver is a vital organ in the digestive system, processing nutrients from the small intestine, bile, fat, and vitamins. It serves as the body's chemical factory, detoxifying harmful chemicals and secreting toxic drugs. LIVER

11. . Gall bladder - a small pear-shaped sac that can hold about 50ml of bile. It stores and concentrates bile from the liver, and then releases it into the duodenum in the small intestine to help absorb and digest fats. GALL BLADDER

12. The rectum , an 8-inch chamber connecting the colon to the anus, receives stool and alerts the brain about evacuation. Sensors send messages to the brain, which decides if rectal contents can be released. If not, the rectum contracts, temporarily easing sensation. RECTUM

13. The anus is the last part of the digestive tract. ANUS

14. ACTIVITY TIME!

15. ACTIVITY TIME! Directions: Identify and name the organs that are part of the digestive system from among the picture in the box shown in the next slide.

16. ASSIGNMENT Search the five most important processes in digestive system as well as its function. (1 WHOLE SHEET OF PAPER)

17. PROCESSES HAPPENS IN DIGESTIVE SYSTEM

18. INGESTION Ingestion involves taking food through the mouth, with teeth, saliva, and tongue playing key roles in mastication. Saliva enzymes chemically process food, transforming it into a soft mass for swallowing.

19. DIGESTION Digestion is the process of breaking down food into smaller, smaller organic fragments for absorption. It involves breaking down complex proteins, polysaccharides, and lipids into simpler sugars. Different organs play specific roles in this process, ensuring nutritional balance in animal diets.

20. ABSORPTION This is when the body absorbs the molecules from the food, taking them through the intestine wall and into the blood where the energy and building blocks can be delivered throughout the body.

21. ASSIMILATION Assimilation is the process of absorbing nutrients and distributing them to the body. Assimilation starts in the mouth as food moves down the throat through the esophagus and into the stomach. From the stomach, food enters the small intestine.

22. EXCRETION Excretion is the process of removing wastes and excess water from the body.

23. What do you call by the process of breaking down food into smaller, smaller organic fragments for absorption . What organ in digestive system is located near the trachea that receives food from the mouth? What is the process of removing wastes and excess water from the body? This is when the body absorbs the molecules from the food, taking them through the intestine wall and into the blood where the energy and building blocks can be delivered throughout the body . What is the organ that breaks down food further into substances, such as glucose, that can be absorbed by the villi? What is the system that makes food absorbable into the body? What is the process of absorbing nutrients and distributing them to the body? It is a small pear-shaped sac that can hold about 50ml of bile . What organ is it?