Cell organisation
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先生の方へ： Cell organisation（KS3 Science、Biology）向けのすぐ使えるレッスンスライド, 復習ノート, 図解 — レッスンで使うか、生徒がライブゲームとして遊ぶインタラクティブなクラス活動としてトピックを実施できます。
レッスンノート
Hierarchy of Cell Organisation
- Multicellular organisms organise cells into a hierarchy: cells → tissues → organs → organ systems → organism.
- Cells are the basic unit of life; similar cells group to form tissues.
- Tissues are groups of similar cells working together to perform a specific function.
- Organs are made of different tissues working together; they have a specific function.
- Organ systems are groups of organs that work together to carry out a major life process.
- The whole organism is made of all organ systems working together.
Example: Animal (Mouse Digestive System)
- Epithelial cells line the stomach, providing a protective barrier and aiding nutrient absorption.
- Epithelial cells group to form epithelial tissue.
- Epithelial tissue joins with other tissues (e.g., muscle, connective) to form the stomach (an organ).
- The stomach combines with other organs (e.g., intestines) to form the digestive system.
- The digestive system is one of several organ systems that make up the whole organism (mouse).
Example: Plant (Leaf)
- Palisade cells are near the leaf surface and contain many chloroplasts for photosynthesis.
- Palisade cells group to form palisade tissue.
- Palisade tissue joins with other tissues (e.g., spongy mesophyll, epidermis) to form a leaf (an organ).
- Leaves combine with other organs (e.g., stems, roots) to form the shoot system.
- The shoot system is part of the whole plant organism.
Key Differences: Tissues vs Organs
- A tissue is a group of similar cells working together (e.g., epithelial tissue).
- An organ is made of different tissues working together (e.g., stomach contains epithelial, muscle, and connective tissues).
- Organs have a more complex structure and specific function than tissues.
Palisade Cell Organelles
- Chloroplasts: site of photosynthesis; contain chlorophyll to absorb light energy.
- Nucleus: contains DNA; controls cell activities.
- Vacuole: stores cell sap; helps maintain turgor pressure.
- Cell wall: provides structural support (made of cellulose).
- Mitochondria: site of aerobic respiration; produce ATP.
Hierarchy of cell organisation in animals (top) and plants (bottom).
スライド
練習問題
無料プレビュー — 55問中8問。すべて見るには登録を。
1.What is the correct order of cell organisation from simplest to most complex?
Easy- Acells → tissues → organs → organ systems → organisms
- Btissues → cells → organs → organ systems → organisms
- Ccells → organs → tissues → organ systems → organisms
- Dcells → tissues → organ systems → organs → organisms
2.Which of the following statements is true?
Medium- AMulticellular organisms are made of many individual cells.
- BThe stomach is a tissue.
- CPlant leaves are not organs.
- DEpithelial cells are needed for photosynthesis.
3.Which of the following is an example of a tissue?
Easy- Aepithelial tissue
- Bstomach
- Cdigestive system
- Dpalisade cell
4.What type of cell lines the stomach and provides a protective barrier?
Easy- Aepithelial cell
- Bpalisade cell
- Cnerve cell
- Dred blood cell
5.A group of similar cells working together is called a:
Easy- Atissue
- Borgan
- Corgan system
- Dorganism
6.In a leaf, which cells contain many chloroplasts for photosynthesis?
Easy- Apalisade cells
- Bepithelial cells
- Cguard cells
- Dspongy mesophyll cells
7.Which of the following correctly describes an organ?
Medium- AA structure made of different tissues working together
- BA group of similar cells performing a specific function
- CA group of organs working together
- DA single cell performing a specific function
8.What is the organ system that includes the stomach and intestines?
Easy- Adigestive system
- Brespiratory system
- Ccirculatory system
- Dnervous system
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