📚 Year 10 Cambridge Biology: A Complete Syllabus Breakdown | Year 10 Cambridge 生物：课程大纲全面解析
Welcome to the comprehensive breakdown of the Year 10 Cambridge IGCSE Biology syllabus. This guide outlines every major topic you will encounter during the first year of the course, helping you understand the scope, key concepts, and how they connect. Whether you are just starting your IGCSE journey or reviewing for assessments, this article serves as a roadmap to build strong biological foundations.
欢迎阅读 Year 10 剑桥 IGCSE 生物学课程大纲的全面解析。本文梳理了你在课程第一年将接触到的所有主要主题，帮助你了解内容范围、关键概念及其相互联系。无论你刚开始 IGCSE 学习之路，还是在为测验复习，这篇文章都能成为你建立扎实生物学基础的路线图。
1. Introduction to the IGCSE Biology Syllabus | 剑桥 IGCSE 生物学课程介绍
The Cambridge IGCSE Biology (0610/0970) syllabus is designed to develop scientific knowledge and practical skills. In Year 10, students typically cover the core topics that lay the groundwork for more advanced study in Year 11. The syllabus is split into Core and Supplement content; Year 10 often focuses on the Core, though some schools may introduce Supplement material early. The course emphasises understanding concepts, applying knowledge to unfamiliar situations, and developing experimental skills through required practical work.
剑桥 IGCSE 生物学（0610/0970）课程大纲旨在培养学生的科学知识和实践技能。Year 10 通常涵盖核心主题，为 Year 11 更深入的学习打下基础。大纲分为核心内容和补充内容；Year 10 一般以核心内容为主，但部分学校会提前引入补充材料。课程强调理解概念、将知识应用于陌生情境，并通过必修实验培养实验技能。
2. Characteristics and Classification of Living Organisms | 生物的特征与分类
All living organisms share a set of characteristics summarised by the acronym 'MRS GREN': Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition. Understanding these life processes helps distinguish living things from non-living matter. Classification systems group organisms based on shared features. The modern system uses DNA analysis to refine evolutionary relationships, but students learn the traditional binomial naming system (Genus species) and the hierarchy: Kingdom, Phylum, Class, Order, Family, Genus, Species. The five Kingdoms of life are typically studied: Animals, Plants, Fungi, Prokaryotes (bacteria), and Protoctists (single-celled eukaryotes). Viruses are not placed in any kingdom because they show no life processes outside host cells.
所有生物都有一组共同特征，可用缩略词 'MRS GREN' 来记忆：运动、呼吸、感应、生长、繁殖、排泄和营养。理解这些生命过程有助于区分生物与非生物。分类系统根据共同特征对生物进行归类。现代系统利用 DNA 分析来完善进化关系，但学生需要学习传统的双名法（属名和种名）以及分类层级：界、门、纲、目、科、属、种。通常学习五界系统：动物界、植物界、真菌界、原核生物界（细菌）和原生生物界（单细胞真核生物）。病毒不归入任何界，因为它们在宿主细胞外不表现生命过程。
3. Cell Biology and Movement Across Membranes | 细胞生物学与跨膜运输
Cells are the basic structural and functional units of life. Students learn the structures of typical animal and plant cells as seen under a light microscope, including the nucleus, cytoplasm, cell membrane, cell wall, chloroplasts, and vacuole. The functions of these organelles are linked to whole-organism processes. The differences between prokaryotic and eukaryotic cells are emphasised—prokaryotes lack a true nucleus and membrane-bound organelles. Movement of substances across cell membranes occurs via diffusion, osmosis, and active transport. Diffusion is the net movement of particles from a region of higher concentration to lower concentration. Osmosis is the diffusion of water through a partially permeable membrane. Active transport uses energy (ATP) to move substances against a concentration gradient. Practical investigations, such as using visking tubing or potato cylinders, reinforce these concepts.
细胞是生命的基本结构和功能单位。学生需要学习光学显微镜下典型的动植物细胞结构，包括细胞核、细胞质、细胞膜、细胞壁、叶绿体和液泡。这些细胞器的功能与整个生物体的生理过程相联系。教学内容强调原核细胞与真核细胞的区别——原核细胞没有真正的细胞核和膜包被的细胞器。物质通过扩散、渗透和主动运输跨越细胞膜。扩散是粒子从高浓度区域向低浓度区域的净移动。渗透是水通过半透膜的扩散。主动运输则利用能量（ATP）将物质逆浓度梯度运输。利用透析袋或马铃薯条进行的实验探究有助于巩固这些概念。
4. Biological Molecules and Enzymes | 生物分子与酶
The large biological molecules—carbohydrates, lipids, proteins, and nucleic acids—are made from smaller repeating subunits. Carbohydrates, such as starch and glycogen, function as energy stores; cellulose provides structural support in plant cell walls. Lipids (fats and oils) are composed of fatty acids and glycerol, serving as long-term energy stores and insulation. Proteins, made from amino acids, have diverse roles including enzymes, antibodies, and structural components. Enzymes are biological catalysts that speed up metabolic reactions without being used up. They have an active site specific to their substrate, described by the lock-and-key model. Enzyme activity is affected by temperature and pH; denaturation occurs at extremes, irreversibly changing the active site shape. Practical work often tests the effect of temperature on amylase activity, using iodine to monitor starch breakdown.
生物大分子——碳水化合物、脂质、蛋白质和核酸——由较小的重复单元构成。碳水化合物如淀粉和糖原作为能量储存物质；纤维素为植物细胞壁提供结构支撑。脂质（脂肪和油）由脂肪酸和甘油组成，起着长期能量储存和保温作用。蛋白质由氨基酸构成，具有多种功能，包括酶、抗体和结构成分。酶是生物催化剂，能加速代谢反应而自身不被消耗。酶的活性部位与其底物特异性结合，可用锁钥模型描述。酶活性受温度和 pH 值影响；在极端条件下会发生变性，使活性部位结构不可逆改变。实验课常研究温度对淀粉酶活性的影响，并用碘液监测淀粉分解。
5. Plant Nutrition and Photosynthesis | 植物营养与光合作用
+ oxygen, in the presence of light and chlorophyll. The balanced chemical equation is: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. Photosynthesis occurs in the chloroplasts of plant cells, where chlorophyll absorbs light energy to drive the reaction. The process is split into two stages: the light-dependent stage (which produces oxygen) and the light-independent stage (Calvin cycle) where glucose is synthesised. Limiting factors such as light intensity, carbon dioxide concentration, and temperature affect the rate of photosynthesis. Students learn how to test for starch in a leaf to confirm photosynthesis has taken place and investigate the effect of varying light intensity using aquatic plants like Elodea.
植物是自养生物，即它们通过光合作用制造自身所需的养料。总文字方程式为：二氧化碳 + 水 → 葡萄糖 + 氧气，反应需要光和叶绿素。其化学方程式为：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。光合作用在植物细胞的叶绿体中进行，叶绿素吸收光能驱动反应。该过程分为两个阶段：光反应阶段（释放氧气）和暗反应阶段（卡尔文循环，合成葡萄糖）。限制因素如光照强度、二氧化碳浓度和温度会影响光合作用速率。学生需学会检测叶片中的淀粉以验证光合作用的发生，并利用水草如伊乐藻探究光照强度变化的影响。
6. Human Nutrition and the Digestive System | 人体营养与消化系统
Humans require a balanced diet containing carbohydrates, proteins, lipids, vitamins, minerals, water, and dietary fibre. The digestive system breaks down large insoluble molecules into small soluble ones that can be absorbed into the bloodstream. Mechanical digestion begins in the mouth with teeth, while chemical digestion involves enzymes. Amylase (in saliva and pancreatic juice) breaks starch into maltose; proteases break proteins into amino acids; lipases break lipids into fatty acids and glycerol. Bile, produced by the liver and stored in the gall bladder, emulsifies fats to increase surface area for lipase action. Absorption primarily occurs in the small intestine, where villi provide a large surface area. Students learn about nutritional deficiencies, such as scurvy from lack of vitamin C, and conduct food tests: Benedict's test for reducing sugars, iodine for starch, biuret for proteins, and ethanol emulsion for fats.
人体需要均衡的膳食，包含碳水化合物、蛋白质、脂质、维生素、矿物质、水和膳食纤维。消化系统将大分子不溶性物质分解为小分子可溶性物质，以便吸收进入血液。机械消化从口腔的牙齿开始，化学消化则由酶完成。唾液和胰液中的淀粉酶将淀粉分解为麦芽糖；蛋白酶将蛋白质分解为氨基酸；脂肪酶将脂质分解为脂肪酸和甘油。肝脏分泌的胆汁储存在胆囊中，通过乳化脂肪来增加脂肪酶作用的表面积。吸收主要在小肠进行，这里的绒毛提供了巨大的表面积。学生需了解营养缺乏症，如缺乏维生素 C 引起的坏血病，并进行食物检测实验：本尼迪克特试验检测还原糖，碘液检测淀粉，双缩脲试验检测蛋白质，乙醇乳化法检测脂肪。
7. Transport in Plants: Xylem and Phloem | 植物体内运输：木质部与韧皮部
Plants have two specialised transport tissues: xylem and phloem. Xylem transports water and dissolved mineral ions from the roots to the leaves. The movement is driven by transpiration pull—water evaporates from leaf surfaces, creating tension that pulls the water column upwards. Xylem vessels are dead, hollow tubes strengthened with lignin. Phloem transports sucrose and amino acids from sources (where they are made, e.g., leaves) to sinks (where they are used or stored, e.g., roots, fruits). This process is called translocation and requires living companion cells to provide energy. Factors affecting transpiration rate include light intensity, temperature, wind speed, and humidity. A potometer can be used to estimate transpiration rate, although it measures water uptake. Understanding these processes links directly to photosynthesis and plant growth.
植物有两种专门的输导组织：木质部和韧皮部。木质部将水和溶解的矿物离子从根部运输到叶片。运输的动力来自蒸腾拉力——水分从叶片表面蒸发，产生张力将水柱向上拉。木质部导管是死细胞构成的中空管道，由木质素加固。韧皮部将蔗糖和氨基酸从源（合成部位，如叶片）运输到库（使用或储存部位，如根和果实）。这一过程称为输导，需要活的伴胞提供能量。影响蒸腾速率的因素包括光照强度、温度、风速和湿度。蒸腾计可用于估测蒸腾速率，尽管它测量的是吸水量。理解这些过程与光合作用和植物生长直接相关。
8. Transport in Animals: The Circulatory System | 动物体内运输：循环系统
Large multicellular organisms require a circulatory system to move substances around the body efficiently. Humans have a double circulatory system: the pulmonary circulation carries blood to the lungs for gas exchange, and the systemic circulation delivers oxygenated blood to the rest of the body. The heart is a muscular pump with four chambers—right atrium, right ventricle, left atrium, left ventricle. Valves prevent backflow. Blood vessels include arteries (carry blood away from the heart, thick muscular walls), veins (return blood to the heart, have valves), and capillaries (thin walls for exchange). Blood consists of plasma, red blood cells (transport oxygen using haemoglobin), white blood cells (defence), and platelets (clotting). The lymphatic system also plays a role in drainage and immunity. Students learn to identify blood cells and to monitor heart rate changes with exercise.
大型多细胞生物需要循环系统来高效地运输物质。人类拥有双循环系统：肺循环将血液送往肺部进行气体交换，体循环则将含氧血输送到全身各处。心脏是一个由肌肉构成的泵，具有四个腔室——右心房、右心室、左心房和左心室。瓣膜防止血液倒流。血管包括动脉（将血液带离心脏，管壁厚且富有肌肉）、静脉（将血液送回心脏，内有瓣膜）和毛细血管（管壁薄，利于物质交换）。血液由血浆、红细胞（通过血红蛋白运输氧气）、白细胞（防御）和血小板（凝血）组成。淋巴系统也在体液回流和免疫中发挥作用。学生需要学习识别血细胞，并监测运动对心率的影响。
9. Gas Exchange and Respiration | 气体交换与呼吸作用
e surface area with thin walls and a rich blood supply. The mechanism of breathing involves the diaphragm and intercostal muscles changing thoracic volume. Respiration is a chemical process that releases energy from glucose. Aerobic respiration uses oxygen: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O (+ energy). Anaerobic respiration occurs without oxygen and produces less energy; in humans it forms lactic acid, while in yeast it produces ethanol and carbon dioxide (fermentation). Respiration takes place in mitochondria, and the energy released (ATP) is used for active transport, muscle contraction, and maintaining body temperature. Investigations include measuring heat production in germinating seeds and demonstrating carbon dioxide production with lime water.
气体交换是获取氧气并排出二氧化碳的过程。在人体内，这一过程发生在肺部的肺泡中，肺泡表面积大、壁薄且血液供应丰富。呼吸运动依靠膈肌和肋间肌改变胸腔容积来实现。呼吸作用是从葡萄糖中释放能量的化学过程。有氧呼吸需要氧气：C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O（+ 能量）。无氧呼吸在缺氧条件下进行，产能较少；在人体中生成乳酸，而在酵母中则产生乙醇和二氧化碳（发酵）。呼吸作用发生在线粒体中，释放的能量（ATP）用于主动运输、肌肉收缩和维持体温。实验探究包括测量发芽种子的产热量，以及用石灰水验证二氧化碳的产生。
10. Coordination and Response: Nervous and Hormonal Systems | 协调与反应：神经系统和激素系统
Organisms respond to changes in their environment to survive. The nervous system uses electrical impulses transmitted along neurones. A reflex arc involves a receptor, sensory neurone, relay neurone (in the CNS), motor neurone, and effector, providing rapid automatic responses. The endocrine system relies on hormones—chemical messengers secreted into the blood. Adrenaline, for example, increases heart rate and prepares the body for 'fight or flight'. Insulin and glucagon regulate blood glucose levels. Plant hormones such as auxins control tropisms: phototropism (response to light) and gravitropism (response to gravity). Auxin accumulates on the shaded side of a shoot, causing cells to elongate more and bending the shoot toward light. Homeostasis—the maintenance of a constant internal environment—is exemplified by temperature regulation and blood glucose control.
生物体对环境变化作出反应以维持生存。神经系统利用沿神经元传导的电冲动进行调节。一个反射弧包含感受器、感觉神经元、中间神经元（位于中枢神经系统）、运动神经元和效应器，能产生快速、自动的反应。内分泌系统则依赖激素——分泌到血液中的化学信使。例如，肾上腺素能提高心率，使身体准备好 '战斗或逃跑'。胰岛素和胰高血糖素共同调节血糖水平。植物激素如生长素控制向性运动：向光性（对光的反应）和向地性（对重力的反应）。生长素在茎的背光侧积累，导致该侧细胞伸长更多，从而使茎朝向光源弯曲。稳态——维持恒定内环境——以体温调节和血糖控制为典型例子。
11. Reproduction in Plants and Humans | 植物与人类的生殖
Reproduction ensures the continuity of species. Asexual reproduction produces genetically identical offspring from one parent, seen in runners, tubers, and bulbs. Sexual reproduction involves the fusion of male and female gametes, resulting in genetic variation. In flowering plants, the flower is the reproductive organ; pollination transfers pollen to the stigma, and fertilisation leads to seed and fruit formation. In humans, the male reproductive system produces sperm, while the female system produces eggs. Fertilisation occurs in the oviduct, and the developing embryo implants in the uterus. The menstrual cycle is controlled by hormones including oestrogen and progesterone. Students learn about puberty, birth control, and sexually transmitted infections. Germination of seeds requires water, oxygen, and a suitable temperature.
生殖保证了物种的延续。无性生殖由一个亲本产生基因相同的后代，如匍匐茎、块茎和鳞茎繁殖。有性生殖涉及雌雄配子的融合，从而产生遗传变异。在开花植物中，花是生殖器官；传粉将花粉传递到柱头，受精后形成种子和果实。在人体中，男性生殖系统产生精子，女性生殖系统产生卵子。受精发生在输卵管内，发育中的胚胎植入子宫。月经周期由雌激素和孕激素等激素调控。学生需了解青春期、避孕和性传播感染。种子的萌发需要水、氧气和适宜的温度。
12. Ecology and Human Influences on the Environment | 生态与人类对环境的影响
Ecology studies the interactions between organisms and their environment. Key terms include population, community, habitat, and ecosystem. Food chains and food webs represent energy flow, with energy being lost at each trophic level (typically about 10% efficiency). The carbon cycle and nitrogen cycle describe how these elements are recycled. Human activities have significant impacts: pollution of water by sewage and fertilisers leads to eutrophication; burning fossil fuels increases atmospheric carbon dioxide, contributing to the greenhouse effect and climate change; deforestation reduces biodiversity and disrupts carbon sinks. Conservation and sustainable development aim to reduce these negative effects. Sampling techniques using quadrats and transects enable students to investigate local ecosystems and population sizes.
生态学研究生物与其环境之间的相互作用。关键术语包括种群、群落、栖息地和生态系统。食物链和食物网表示能量的流动，每一营养级都有能量损失（效率通常约10%）。碳循环和氮循环描述了这些元素如何被循环利用。人类活动有着显著的影响：污水和化肥导致水体污染并引发富营养化；燃烧化石燃料增加了大气中的二氧化碳，加剧了温室效应和气候变化；森林砍伐降低了生物多样性并破坏了碳汇。保护与可持续发展旨在减少这些负面影响。使用样方和样线进行取样能让学生探究当地生态系统及种群数量。
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