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    Learning Activity Sheet

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    liagiba_abby
    The document provides information about the digestive system and the process of digestion in humans. It explains that digestion begins in the mouth through chewing and enzymes in saliva. Food then moves to the stomach through the esophagus where acids and enzymes further break it down. Nutrients are then absorbed in the small intestine before waste moves to the large intestine and is eventually excreted through the anus. The learning activity sheet aims to help students explain the processes of ingestion, absorption, assimilation, and excretion.

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    Learning Activity Sheet

    Uploaded by

    liagiba_abby
    30 views2 pages
    The document provides information about the digestive system and the process of digestion in humans. It explains that digestion begins in the mouth through chewing and enzymes in saliva. Food then moves to the stomach through the esophagus where acids and enzymes further break it down. Nutrients are then absorbed in the small intestine before waste moves to the large intestine and is eventually excreted through the anus. The learning activity sheet aims to help students explain the processes of ingestion, absorption, assimilation, and excretion.

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    Original Title

    LEARNING ACTIVITY SHEET

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    The document provides information about the digestive system and the process of digestion in humans. It explains that digestion begins in the mouth through chewing and enzymes in saliva. Food then moves to the stomach through the esophagus where acids and enzymes further break it down. Nutrients are then absorbed in the small intestine before waste moves to the large intestine and is eventually excreted through the anus. The learning activity sheet aims to help students explain the processes of ingestion, absorption, assimilation, and excretion.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    30 views2 pages

    Learning Activity Sheet

    Uploaded by

    liagiba_abby
    The document provides information about the digestive system and the process of digestion in humans. It explains that digestion begins in the mouth through chewing and enzymes in saliva. Food then moves to the stomach through the esophagus where acids and enzymes further break it down. Nutrients are then absorbed in the small intestine before waste moves to the large intestine and is eventually excreted through the anus. The learning activity sheet aims to help students explain the processes of ingestion, absorption, assimilation, and excretion.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    LEARNING ACTIVITY SHEET

    SCIENCE 8
    Quarter 4 Week 1

    L I. LEARNING SKILLS
    a. Most Essential Learning Competency
    Explain ingestion, absorption, assimilation, and excretion. (S8LT-IV-13)
    b. Objective
    At the end of the learning activity sheet, you should be able to:
     explain ingestion, absorption, assimilation, and excretion.

    II. INTRODUCTORY CONCEPT


    Food plays a central role in the survival of species. Food gives organisms energy that enables them to carry out
    the many activities they do each day; this includes predators chasing a prey or a prey escaping a predator, arboreal
    organisms climbing trees to gather fruits, or fish swimming in schools in search for food, to name a few. Organisms
    are able to obtain energy from the foods they eat through digestion.
    Digestion of food is carried out by the organs and substances of the digestive system. During digestion, food is
    broken down to smaller parts -- a fraction of which is made up of nutrients. These nutrients are circulated to the
    different parts of the body through the bloodstream and assimilated by the cells.
    Almost all animals have a digestive system in which food enters the mouth, then, it is moved through a long tube,
    and exits the anus as feces. The food is broken down into soluble molecules and is moved rhythmically by the smooth
    muscle in the walls of the digestive organs.
    Different species of organisms have different ways of digesting their food. In humans, digestion starts in the
    mouth where food is chewed and broken down to smaller pieces for easier digestion. This is called mechanical
    digestion. Initial chemical digestion starts also in the mouth. This is carried out by enzymes -- molecules that speed up
    chemical reactions. Enzymes present in saliva such as amylase helps break down carbohydrates, which are large
    complex molecules, into simpler ones that can be used by the body.
    After swallowing, the food -- now turned into a bolus – enters the esophagus (gullet) and is moved down into
    the stomach where it mixes with gastric juices and acids. Other enzymes such as protease and lipase help break
    down proteins in the stomach and fats in the small intestine, respectively. Digestion ends in the small intestine where
    nutrients absorbed in the villi and enter the circulatory system. Wastes that remain after digestion go to the large
    intestine where water is also reabsorbed. These wastes, including the water that was not reabsorbed, are temporarily
    stored in the rectum before they are excreted out of the body through the anus.
    Digestion in other organisms works similarly. However, there are specialized structures found in some
    species that perform special digestive functions.

    III. ACTIVITIES

    Practice Task I: The Digestive System


    A. Study the picture and fill out the necessary information needed in the picture below. Choose your answers
    found on the box below. Write your answers on the answer sheet provided.
    (1)
    (2)
    (3)

    (5)
    (4)
    (7)
    (6)

    (8)
    (9)

    (10)
    (11)

    ASSESSMENT
    I. Identify what is being asked below. Choose your answer from the options found on the box. Write your
    answers on the answer sheet provided.

    mouth salivary glands rectum large intestine


    liver esophagus small intestine pancreas
    gallbladder stomach anus

    1. Digestion begins here, mechanical, and chemical digestion occurs here.


    2. A muscular tube that connects the mouth to the stomach.
    3. Bile is created here, and it helps in digestion – breaking down of foods.
    4. Store bile until it is needed.
    5. This is where most of the nutrients are absorbed.
    6. This is where the water is absorbed.
    7. This is the final straight portion of the large intestine where waste is stored.
    8. This is where waste leaves the body.
    9. This produces saliva. It also secretes amylase, an enzyme that breaks down starch.
    10. It produces insulin which helps to break down sugar in the body.

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