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      Systems
      The organisation of the human body
      Without background sound
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      4. Systems

      /useruploads/ctx/a/28990309/r/s/6545579/AU-0S3BY1-01-019.mp3?idcurso=613089Talking book

      Systems, formed by organs, share the necessary tasks to perform the functions of nutrition, reproduction and interaction of an organism.

      4.1. Nutrition

      /useruploads/ctx/a/28990309/r/s/6545579/AU-0S3BY1-01-020.mp3?idcurso=613089Talking book
      Nutrition

      Nutrition is the group of processes that allows us to use and transform the substances we need in order to stay alive.

      Four systems carry out nutrition:

      • Digestive system: it prepares ingested foods so the cells can use them.

      • Respiratory system: it carries the oxygen that cells need to the blood.

      • Circulatory system: It shares nutrients and oxygen between cells. It also collects unwanted substances that the cells produce.

      • Excretory system: it takes excretory substances and releases them to the exterior. It also participates in regulating the internal environment.

      4.2. Reproduction

      /useruploads/ctx/a/28990309/r/s/6545579/AU-0S3BY1-01-021.mp3?idcurso=613089Talking book

      Reproduction ensures our survival over time. The male and female reproductive system are involved in this function.

      Male reproductive system: it produces male gametes (spermatozoids) and makes the fertilisation of the female gametes (eggs) possible.

      Female reproductive system: it produces female gametes (eggs). It’s fertilised when united with male gametes (spermatozoids).

       

       

      4.3. Interaction

      /useruploads/ctx/a/28990309/r/s/6545579/AU-0S3BY1-01-022.mp3?idcurso=613089Talking book

      Interaction takes place due to the existence of the nervous, endocrine, skeletal and muscular systems as well as the sense organs.

      Nervous system: it receives information from the environment and makes adequate answers. 

      Endocrine system: formed by certain organs that secrete substances (hormones) that affect an organism in different ways.

      Skeletal and muscular systems: these systems are in charge of movement. Bones and muscles respectively form the skeletal and muscular systems.

       

       

      Sense organs. They capture important information for the organism and enable the body to adapt and survive.
      Weblink 3: The human body

      Key concepts

      • Four systems (digestive, respiratory, circulatory and excretory) intervene in nutrition.
      • The male and female reproductive systems perform reproduction.
      • The nervous system, endocrine system and sense organs participate in interaction.
       
      Systems
      The organisation of the human body
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      Activity 25

      Which system is represented in each image? 

      Nutrition

      Done
      Systems
      The organisation of the human body
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      Activity 26

      Explain which common characteristics all the tissues that form our organism share. 

      Done
      Systems
      The organisation of the human body
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      Activity 27

      What type of information does each sense organ capture?

      image

       

      • sight

      • hearing

      • smell

      • taste

      • feel

      • it helps us perceive different sensations such as texture, cold or heat

      • it picks up sounds

      • it captures smells

      • it gives us information about flavours

      • it gives us visual information

      Done
      Systems
      The organisation of the human body
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      Activity 28

      /useruploads/ctx/a/28990309/r/s/6545619/AU-0S3BY1-01-023.mp3?idcurso=613089Listen to the following statements and say true or false. Correct the false sentences.
      • a)
      • Correct answer
        Wrong answer
      • b)
      • Correct answer
        Wrong answer
      • c)
      • Correct answer
        Wrong answer
      • d)
      • Correct answer
        Wrong answer
      • e)
      • Correct answer
        Wrong answer

      Done
      Systems
      The organisation of the human body
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      Correct the false sentences below:

      Done
      Systems
      The organisation of the human body
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      Activity 29

      Why do we say that the sense organs enable organisms to adapt and survive?

      Done

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