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Specialized Respiratory Systems

Lesson Plan

Specialized Respiratory Systems

Objectives

In this lesson, students learn that all living things need oxygen in their cells to release energy. They compare the specialized respiratory systems of several animals and investigate how frog respiration changes during its life cycle. Students will:

  • explain how living things use specialized respiratory systems to obtain energy.

  • compare the respiratory systems of different types of animals.

  • explain how plants take in oxygen and why they need it.

Essential Questions

Vocabulary

  • Specialized Parts: Parts of living things that have a structure that fits the function that they carry out (e.g., lungs are specialized for breathing).

  • Respiratory System: A system of organs that moves oxygen into the body and removes carbon dioxide from the body.

  • Gills: Structures for taking in oxygen from water. Sometimes located inside the body and sometimes on the outer surface of the body. Usually found in fish and amphibians.

  • Lungs: Organs that are connected to the environment by tubes; function to take in oxygen and release carbon dioxide. Usually found in animals with backbones.

  • Tracheae: A system of tubes that carry oxygen directly to the cells of the body. Usually found in insects and spiders.

  • Stomata: Tiny openings in plant leaves that allow oxygen to enter.

Duration

75–90 minutes/2 class periods

Prerequisite Skills

Prerequisite Skills haven't been entered into the lesson plan.

Materials

Related Unit and Lesson Plans

Related Materials & Resources

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.

  • Jigsaw Classroom: Overview of the Technique
www.jigsaw.org/overview.htm
www.thefrog.org/biology/breathing/breathing.htm

Formative Assessment

  • View
    • Monitor students as they complete the jigsaw activity, asking them questions about their animals’ respiratory systems to check for understanding.

    • Circulate around the classroom as students work on the Comparing the Respiratory Systems of Animals worksheet, and correct any misunderstandings as necessary.

    • Collect and review the Comparing the Respiratory Systems of Animals worksheet.

Suggested Instructional Supports

  • View
    Scaffolding, Active Engagement, Modeling, Explicit Instruction
    W:

    Students investigate and compare different kinds of structures used for respiration, but they draw the conclusion that all of these specialized parts deliver oxygen to cells for energy release. Students make connections between the role of oxygen in photosynthesis and animal respiration. Then, they are introduced to cell respiration, which will be built upon in the next lesson.

    H:

    At the beginning of the lesson, students are engaged as they share why they need to breathe constantly.

    E:

    The jigsaw activity provides students with the opportunity to study respiratory systems in familiar types of animals. The jigsaw activity engages all students as active learners.

    R:

    The content from the jigsaw activity is reinforced with follow-up questions and discussion. Students are asked to reflect on the role of oxygen in plants as well as animals.

    E:

    Students express their understanding by teaching each other during the jigsaw activity and answering the follow-up questions.

    T:

    For students who need more support, a structured worksheet will be provided for recording their findings as they research during the jigsaw activity. Students who require an extra challenge may research the respiratory system of amphibians throughout their life cycle.

    O:

    This lesson is organized by having students conduct research first, share their findings with their classmates, and then complete independent work to reinforce learning. The lesson concludes with a guided discussion to solidify connections to the previous and upcoming lessons on obtaining energy.

Instructional Procedures

  • View

    Have students conduct a think-pair-share activity: Have each student inhale, then hold his/her breath to the count of 10, then breathe normally. Ask students, “Why do we need to breathe continuously throughout our lives?” Then, ask pairs of students to share their thoughts on the question with one another.

    Ask students where every living thing on Earth gets the energy it needs to survive. Elicit that living things need food energy, and tell them that we break our food down into molecules that we send to our body cells. Ask students how we get the energy out of food molecules that we eat. Ask students to take a deep breath, and tell them that every time we breathe, we send oxygen to our cells so we can use it to release food energy. This is a relevant time to elicit connections to the fact that the Sun is the ultimate source of energy on Earth and to the process of photosynthesis as a food production system.

    Tell students that living things have many specialized parts for obtaining oxygen. Define specialized and ask students what specialized organs humans use to take in oxygen (i.e., the lungs). Have groups of five students do a jigsaw activity on the respiratory systems of insects, fish, birds, mammals, and reptiles. For each type of animal, have students find out: what structure(s) the animal uses to breathe (name and draw them), how they use the structures, and how they deliver oxygen to their cells. Be sure to have each “expert group” review its findings before students return to their original groups to share. Have students take notes on each type of respiratory system, which they will use to complete the follow-up worksheet. (Note: If you are unfamiliar with the jigsaw technique, see Jigsaw Classroom: Overview of the Technique at the following Web site: www.jigsaw.org/overview.htm.)

    Hand out the Comparing the Respiratory Systems of Animals worksheet (S-7-8-2_Comparing the Respiratory Systems of Animals.docx), and have students complete it individually. Collect the worksheets to assess student understanding (S-7-8-2_Comparing the Respiratory Systems of Animals KEY.docx).

    Conduct a whole-class discussion to reinforce why every animal needs specialized parts for respiration. Guide students in explaining that animals have different respiratory structures to function in different environments (e.g., under water). Elicit that animals need energy for their growth and life functions, and they need oxygen to release the energy from their food.

    Show students an image of plant cells with open stomata. Explain that stomata are tiny openings in the surface of plant leaves and ask students what they think stomata are used for. Guide students by asking them how they think plants “breathe.” Explain that plants need oxygen too, to release energy from the food they make. Have students sketch a plant leaf with several cells and label the flow of oxygen into the cells through stomata using arrows.

    Have students write a paragraph describing how their own respiratory system is made up of parts that work together to deliver oxygen to their bodies. The paragraph should include the following terms: nose, lungs, alveoli, oxygen, and cells.

    Extension:

    • Provide students who may need assistance with the jigsaw activity research with the Animal Respiratory System Research worksheet (S-7-8-2_Animal Respiratory System Research.docx) to complete during the jigsaw activity.

    • Students performing above and beyond the standards can further investigate respiration in amphibians and diagram a frog’s life cycle, labeling how frogs take in oxygen at each stage of their lives.

Related Instructional Videos

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DRAFT 11/18/2010
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