Year 9 Edexcel Biology: Vocabulary Rapid Retention Guide | Edexcel 九年级生物学术词汇速记指南

📚 Year 9 Edexcel Biology: Vocabulary Rapid Retention Guide | Edexcel 九年级生物学术词汇速记指南

Mastering Edexcel Year 9 Biology starts with a strong command of essential terminology. This guide breaks down tricky words through root analysis, mnemonics and vivid analogies, turning memory work into an active, engaging process.

掌握 Edexcel 九年级生物学，首先要牢牢记住核心术语。本指南通过词根分析、记忆口诀和生动类比，把枯燥的记忆变成主动有趣的学习过程。

1. Cell Structure Key Terms | 细胞结构核心术语

Every living organism is made of cells. To recall organelles quickly, link their names to what they do. We will use the ‘city of the cell’ analogy and simple word roots.

所有生物都由细胞组成。为快速记住细胞器，我们可以把它们的功能与名称挂钩，并运用“细胞城市”类比和简单词根。

Nucleus: This spherical organelle stores DNA and directs protein synthesis. The Latin root ‘nucleus’ means ‘kernel’ or ‘nut’. Picture the nucleus as the mayor’s office directing the entire city.

细胞核（Nucleus）：这个球形细胞器储存 DNA 并指挥蛋白质合成。拉丁词根“nucleus”意为“果仁”或“核心”。把细胞核想象成指挥整个城市的市长办公室。

Cytoplasm: Combining ‘cyto-‘ (cell) and ‘-plasm’ (fluid), the cytoplasm is the jelly-like substance filling the cell where metabolic reactions occur. Think of it as the city’s open spaces where people work and goods are moved.

细胞质（Cytoplasm）：“cyto-”表示细胞，“-plasm”表示流体。细胞质是充满细胞的胶状物质，新陈代谢在此进行。把它想象成城市中人们工作和运输货物的开放空间。

Mitochondria: Often called the powerhouse, mitochondria carry out aerobic respiration to release energy. Use the mnemonic ‘Mighty mitochondria make massive energy’. The singular is mitochondrion.

线粒体（Mitochondria）：常被称为“能量工厂”，进行有氧呼吸释放能量。用口诀“Mighty mitochondria make massive energy”（强大的线粒体制造大量能量）。单数形式为 mitochondrion。

Ribosomes: Tiny structures that synthesise proteins by translating genetic code. They can float freely or attach to rough endoplasmic reticulum. Remember ‘ribo-somes build proteins like ribs protect the core’.

核糖体（Ribosomes）：微小的结构，通过翻译遗传密码合成蛋白质。它们可自由漂浮或附着在粗面内质网上。记法：Ribosome 中的 ‘ribo’ 像肋骨一样保护核心，它“制造”蛋白质。

Chloroplast: Only in plant cells and some protists; it carries out photosynthesis. ‘Chloro-‘ means green, and ‘-plast’ means formed. Visualise tiny green kitchens cooking glucose with sunlight.

叶绿体（Chloroplast）：仅存在于植物细胞和部分原生生物，进行光合作用。“Chloro-”表示绿，“-plast”表示成形。想象成微型绿色厨房，用阳光烹制葡萄糖。

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2. Transport Across Membranes | 跨膜运输术语

Substances move in and out of cells through three key processes. Understanding prefixes and core ideas will help you never confuse them.

物质进出细胞依赖三种关键过程。搞清前缀和核心概念，你就再也不会混淆它们。

Diffusion: The net movement of particles from a region of high concentration to a region of low concentration, down a concentration gradient. Think of ‘diffusion’ as ‘di-ffusing apart’, like perfume spreading in a room. No energy is needed.

扩散（Diffusion）：粒子从高浓度区域向低浓度区域净移动，顺浓度梯度。联想“diffusion”中的“diffuse”（弥漫），如同香水的味道在房间散开，不需要能量。

Osmosis: The diffusion of water molecules through a partially permeable membrane from a dilute solution to a more concentrated solution. The word root ‘osmo-‘ relates to pushing. Pretend water is being pushed towards the saltier side.

渗透（Osmosis）：水分子通过半透膜从稀溶液向浓溶液扩散。“Osmo-”词根与推动有关。想象水被推向盐分更高的一侧。

Active transport: The movement of particles against a concentration gradient using energy from respiration. A carrier protein changes shape. Mnemonic: ‘Active Army Acts Against the gradient’—it requires ATP.

主动运输（Active transport）：利用呼吸作用提供的能量，逆浓度梯度移动粒子，载体蛋白会变形。口诀：“Active Army Acts Against the gradient”（活跃的军队逆梯度行动）——它需要 ATP。

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3. Levels of Organisation | 组织层次术语

Biology builds complexity step by step. Memorising the hierarchy from cell to organism is easier with a silly sentence.

生物学逐步构建复杂性。用一个滑稽的句子就能轻松记住从细胞到生物体的层级。

The standard sequence is: Cell → Tissue → Organ → Organ System → Organism. Use ‘Clever Tigers Only Sit Observing’ or create your own story like ‘Cats Try Old Soggy Oranges’.

标准顺序为：细胞 → 组织 → 器官 → 器官系统 → 生物体。用“聪明的老虎只坐着观察”（Clever Tigers Only Sit Observing）或自编故事如“猫试吃老湿橘子”。

Tissue: A group of similar cells working together to perform a specific function, such as muscle tissue or xylem tissue. The word comes from Latin ‘texere’, to weave, so a tissue is a woven fabric of cells.

组织（Tissue）：一组相似的细胞协同完成特定功能，例如肌肉组织或木质部组织。该词源自拉丁语“编织”，因此组织就像细胞编织成的布。

Organ: Made of different tissues that work collectively; the stomach is an organ containing muscular and epithelial tissues. The term ‘organ’ shares its root with ‘organism’, reflecting a structured tool.

器官（Organ）：由不同组织共同协作构成，例如胃含有肌肉组织和上皮组织。“Organ”与“organism”同源，反映其作为结构化工具的含义。

Organ system: A group of organs performing a major function, like the digestive system. Think of it as a team of organs.

器官系统（Organ system）：一组器官执行主要功能，如消化系统。可以将其视为器官团队。

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4. Enzymes and Digestion | 酶与消化

Enzymes are biological catalysts with specific active sites. Mastering the key terms around digestion will clarify how large molecules are broken down.

酶是具有特定活性位点的生物催化剂。掌握消化相关关键术语，可以了解大分子如何被分解。

Enzyme: A protein that speeds up chemical reactions without being used up. The ‘-ase’ ending tells you it is an enzyme. All digestive enzymes end in ‘-ase’. Memory: ‘Enzymes ease reactions’.

酶（Enzyme）：一种可以加速化学反应而自身不被消耗的蛋白质。词尾“-ase”表示酶，所有消化酶都以“-ase”结尾。记忆：“Enzyme eases reactions”。

Active site: The region on an enzyme where the substrate binds. The lock-and-key model or induced-fit model describes this. Visualise a lock (enzyme) that only fits a specific key (substrate).

活性位点（Active site）：酶上底物结合的区域。锁钥模型或诱导契合模型描述这一过程。想象一把锁（酶）只与特定的钥匙（底物）匹配。

Substrate: The molecule that an enzyme acts upon. When the substrate is broken down or built up, it becomes the product. ‘Sub-‘ means under, the substance lying under the enzyme’s action.

底物（Substrate）：酶所作用的分子。底物被分解或合成为产物。“Sub-”表示在下面，底物处在酶作用之下。

Amylase: An enzyme that breaks down starch into maltose. The root ‘amyl-‘ means starch. Picture ‘Amy’ chewing starchy bread.

淀粉酶（Amylase）：将淀粉分解为麦芽糖的酶。词根“amyl-”表示淀粉。想象“Amy”在嚼淀粉面包。

Protease: Breaks down protein into amino acids. ‘Prote-‘ refers to protein. Mnemonic: ‘Protease processes protein’. Lipase similarly breaks lipids into fatty acids and glycerol (lipo- = fat).

蛋白酶（Protease）：把蛋白质分解成氨基酸。“Prote-”指蛋白质。口诀：“Protease processes protein”。脂肪酶（lipase）则分解脂质为脂肪酸和甘油（lipo- = 脂肪）。

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5. Circulatory System | 循环系统术语

The heart, blood vessels and blood components have precise names. Directional clues and word origins help sort arteries from veins.

心脏、血管和血液成分都有精确的名称。方向线索和词源能帮你分清动脉与静脉。

Heart chambers: Atria (upper) and ventricles (lower). ‘Atrium’ means entrance hall in Latin; blood enters here. Ventricles have thick walls to pump blood out. Remember ‘A before V’ like alphabet—blood enters Atrium then goes to Ventricle.

心腔：心房（上）与心室（下）。“Atrium”在拉丁语中意为门厅，血液由此进入。心室壁厚，负责泵出血液。记住字母顺序“A 在 V 前”，血液先进心房后进心室。

Arteries: Thick-walled, muscular vessels carrying blood away from the heart. Most carry oxygenated blood. Mnemonic: ‘Arteries go Away’. Veins carry blood toward the heart and have valves to prevent backflow. ‘Veins have Valves’, and both start with V.

动脉（Arteries）：厚壁、肌肉发达的血管，将血液带离心脏，大部分输送含氧血。口诀：“Arteries go Away”（动脉离开）。静脉（Veins）将血液送回心脏，并有瓣膜防止回流。“Veins have Valves”，两者都以 V 开头。

Capillaries: Microscopic, one-cell-thick vessels where exchange of gases and nutrients occurs. The name comes from ‘capillus’ meaning hair—as thin as hair. Red blood cells squeeze through single file.

毛细血管（Capillaries）：管壁仅一个细胞厚度的微小血管，气体和营养物质在此交换。名字来源于“capillus”（毛发），像毛发一样细。红细胞排成单行通过。

Blood components: Red blood cells (erythrocytes) carry oxygen using haemoglobin. White blood cells (leucocytes) fight infection. Platelets are cell fragments aiding clotting. Plasma is the straw-coloured liquid transporting everything. Use colour associations: red for oxygen, white for defence.

血液成分：红细胞携带氧气（含血红蛋白），白细胞抗感染，血小板是帮助凝血的细胞碎片，血浆是运输一切物质的淡黄色液体。使用颜色联想：红色与氧气，白色与防御。

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6. Respiratory System and Gas Exchange | 呼吸系统与气体交换

Breathing and gas exchange involve the lungs, alveoli and diaphragm. Knowing the terms for ventilation will support your understanding of energy release.

呼吸与气体交换涉及肺、肺泡和膈肌。了解通气相关的术语有助于理解能量释放。

Trachea: The windpipe reinforced with C-shaped cartilage rings. ‘Trachea’ sounds like ‘track’, the airway track to the lungs. It branches into bronchi (singular: bronchus), like a tree trunk dividing.

气管（Trachea）：由 C 形软骨环支撑的呼吸道。“Trachea”读音类似“track”，通往肺的气道。它分支为支气管（bronchi，单数 bronchus），就像树干分叉。

Alveoli: Tiny air sacs at the end of bronchioles where gas exchange occurs. Singular is alveolus. The word resembles ‘alveolate’ meaning honeycombed. Envision clusters of grapes to remember their large surface area.

肺泡（Alveoli）：细支气管末端的微小气囊，气体交换在此进行。单数为 alveolus。这个词类似“alveolate”（蜂窝状的）。将它们想象成一串串葡萄，以记住其巨大的表面积。

Diaphragm: A dome-shaped muscle separating the chest from the abdomen. When it contracts and flattens, air is drawn in. Think of ‘dia-phragm’ as a ‘diaphragm pump’. The intercostal muscles between the ribs also assist.

膈肌（Diaphragm）：分隔胸腔与腹腔的穹顶形肌肉。它收缩变平时吸入空气。把“diaphragm”联想为一片膈膜泵。肋间肌也参与协助。

Gas exchange: Oxygen diffuses from alveoli into capillaries, carbon dioxide moves the opposite way. Remember the acronym ‘RAG’: Respiration Alveoli Gases, or that oxygen goes In and CO₂ goes Out.

气体交换：氧气从肺泡扩散到毛细血管，二氧化碳反向移动。记住简写“RAG”或联想氧气进、二氧化碳出的双向流动。

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7. Genetics and Inheritance Vocabulary | 遗传学词汇

The language of inheritance can feel abstract, but decoding prefixes and applying a ‘gene-machine’ analogy makes it stick.

遗传学的语言可能感觉抽象，但通过解读前缀和使用“基因机器”类比，就能牢固掌握。

DNA: Deoxyribonucleic acid, the molecule carrying genetic instructions. Break it down: ‘deoxy-ribo-nucleic acid’. Chromosomes are coiled structures of DNA found in the nucleus. Humans have 46.

DNA：脱氧核糖核酸，携带遗传指令的分子。分解为“脱氧-核糖-核酸”。染色体（Chromosomes）是存在于细胞核内的 DNA 卷曲结构，人类有 46 条。

Gene: A segment of DNA coding for a characteristic. Allele: A version of a gene. Use the analogy of a book: DNA is the whole book, a gene is a chapter, and alleles are different editions of that chapter.

基因（Gene）：编码某一性状的 DNA 片段。等位基因（Allele）：基因的一个版本。用书作类比：DNA 是整本书，基因是一个章节，等位基因是该章节的不同版本。

Dominant vs Recessive: A dominant allele masks the effect of a recessive allele. Think of dominant as ‘dominating’ the conversation. Use upper case letter for dominant (e.g., B) and lower case for recessive (b).

显性与隐性：显性等位基因会掩盖隐性等位基因的效应。想象显性在对话中“支配”全场。通常用大写字母表示显性（如 B），小写表示隐性（如 b）。

Homozygous and Heterozygous: Homo- means same (BB or bb); hetero- means different (Bb). Genotype is the genetic makeup, while phenotype is the physical expression. Memory: ‘Genotype = Gene type; Phenotype = Physical features’.

纯合与杂合：Homo- 意为相同（BB 或 bb）；hetero- 意为不同（Bb）。基因型（Genotype）是遗传组成，表现型（Phenotype）是物理表现。记忆：“Genotype = 基因类型；Phenotype = 物理特征”。

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8. Evolution and Natural Selection | 进化与自然选择

Darwin’s theory rests on a few key words. Chaining them in a step-by-step story will imprint them in your memory.

达尔文的理论建立在几个关键词上。把它们串成一步步的故事就能牢牢印在脑海中。

Variation: Differences between individuals of a species due to genetic diversity and mutations. Without variation there is no raw material for selection. ‘Variety is the spice of life’—and of evolution.

变异（Variation）：同一物种个体之间因遗传多样性和突变而产生的差异。没有变异，就没有选择的原材料。“变化是生活的调味品”，也是进化的原料。

Natural selection: The process where organisms with advantageous traits survive and reproduce more. Phrase it as ‘Nature Selects the Best’. It is sometimes called ‘survival of the fittest’.

自然选择（Natural selection）：具有有利特征的生物体更好地存活并繁殖的过程。可表述为“自然选择最优者”。有时被称为“适者生存”。

Adaptation: A feature that improves an organism’s chance of survival. Camel humps store fat, not water—an adaptation to hot deserts. The root ‘adapt’ means to fit to.

适应（Adaptation）：能提高生物体生存机会的特征。驼峰储存的是脂肪而非水，这是对炎热沙漠的适应。“Adapt”词根意为适合。

Mutation: A random change in DNA that can create new alleles. Most mutations are neutral or harmful, but some provide an advantage. Think ‘mutant’—a change from the norm, but in Biology it is simply a variation.

突变（Mutation）：DNA 中随机的变化，可产生新的等位基因。大多数突变中性或有害，但有些带来优势。想到“突变体”，它偏离常态，但在生物学中它仅仅是一种变异。

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9. Ecology and Ecosystems | 生态学与生态系统

Ecology terms form a hierarchy from single species to entire biomes. Connecting numerical prefixes and feeding roles will make sense of food webs.

生态学术语形成从单物种到整个生物群系的层级。连接数字前缀和取食角色，就能理解食物网。

Habitat: The place where an organism lives. Population: All individuals of one species in a habitat. Community: All populations living together. Ecosystem: The community plus abiotic factors. Use the nested sequence: Happy Penguins Create Ecosystems.

栖息地（Habitat）：生物居住的地方。种群（Population）：同一栖息地内同一物种的所有个体。群落（Community）：生活在一起的所有种群。生态系统（Ecosystem）：群落加上非生物因素。用嵌套顺序记忆：Happy Penguins Create Ecosystems（快乐的企鹅创造生态系统）。

Producer: Usually green plants that make their own food by photosynthesis. Consumer: An organism that eats other organisms. Primary consumers eat producers, secondary consumers eat primary consumers. The prefix tells the level.

生产者（Producer）：通常是通过光合作用制造食物的绿色植物。消费者（Consumer）：以其他生物为食的生物。初级消费者吃生产者，次级消费者吃初级消费者。前缀表示营养级。

Decomposer: Bacteria and fungi that break down dead material, recycling nutrients. The word ‘decompose’ means to break down. Remember they are nature’s clean-up crew.

分解者（Decomposer）：分解死物质、循环养分的细菌和真菌。“Decompose”意为分解。记住它们是大自然的清洁队。

Biodiversity: The variety of living organisms in an area. ‘Bio-‘ life + ‘diversity’ variety. High biodiversity makes ecosystems stable. Think of a diverse tool kit with many options.

生物多样性（Biodiversity）：某一区域内生物的种类繁多程度。“Bio-”生命 + “diversity”多样性。高生物多样性使生态系统稳定。想象一个有多种选择的工具箱。

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10. Photosynthesis and Plant Transport | 光合作用与植物运输

Plants have their own vocabulary for making food and moving water. Breaking down photosynthesis tells you exactly what happens.

植物有自己的制造食物和运输水分的术语。拆解光合作用的单词，就能准确了解整个过程。

Photosynthesis: ‘Photo-‘ means light, ‘synthesis’ means putting together. The summary equation is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6

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