# Grade 11 Life Sciences Notes > CAPS-aligned Grade 11 Life Sciences revision notes, broken down topic by topic with worked examples, diagrams, and key definitions. - Page: https://www.hlayiso.com/grade-11/life-sciences/notes Breadcrumbs: [Home](https://www.hlayiso.com/) › [Grade 11](https://www.hlayiso.com/grade-11) › [Life Sciences](https://www.hlayiso.com/grade-11/life-sciences) › [Notes](https://www.hlayiso.com/grade-11/life-sciences/notes) ## Topics Each section has a free preview; the full notes are in the free Hlayiso account. ### Gaseous exchange - [Gaseous exchange notes](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange) - [Requirements of Efficient Gas Exchange](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange/requirements-of-efficient-gas-exchange) - [The Human Ventilation System](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange/the-human-ventilation-system) - [Gaseous Exchange in Alveoli & Transport of Gases](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange/gaseous-exchange-in-alveoli-and-transport-of-gases) - [Homeostatic Control of Breathing](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange/homeostatic-control-of-breathing) ### Excretion - [Excretion notes](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion) - [Excretory Organs & Their Functions](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/excretory-organs-and-their-functions) - [The Urinary System & Kidney Structure](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/the-urinary-system-and-kidney-structure) - [The Nephron & Urine Formation](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/the-nephron-and-urine-formation) - [Homeostatic Control of Water & Salts](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/homeostatic-control-of-water-and-salts) ### Biodiversity and classification of micro-organisms - [Biodiversity and classification of micro-organisms notes](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms) - [Structure & Characteristics of Micro-organisms](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms/structure-and-characteristics-of-micro-organisms) - [Roles & Symbiotic Relationships of Micro-organisms](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms/roles-and-symbiotic-relationships-of-micro-organisms) - [Diseases Caused by Micro-organisms](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms/diseases-caused-by-micro-organisms) - [Immunity, Antibiotics & Vaccinations](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms/immunity-antibiotics-and-vaccinations) ### Biodiversity in plants and reproduction - [Biodiversity in plants and reproduction notes](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-plants-and-reproduction) - [Plant Groups: Bryophytes to Angiosperms](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-plants-and-reproduction/plant-groups-bryophytes-to-angiosperms) - [Comparative Features of the Four Plant Groups](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-plants-and-reproduction/comparative-features-of-the-four-plant-groups) - [Reproduction in Plants & Pollination Adaptations](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-plants-and-reproduction/reproduction-in-plants-and-pollination-adaptations) ### Biodiversity in animals - [Biodiversity in animals notes](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-animals) - [The Concept of a Phylum & Body Plans](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-animals/the-concept-of-a-phylum-and-body-plans) - [Six Animal Phyla & Comparative Features](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-animals/six-animal-phyla-and-comparative-features) - [The Role of Invertebrates in Agriculture & Ecosystems](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-animals/the-role-of-invertebrates-in-agriculture-and-ecosystems) ### Population ecology - [Population ecology notes](https://www.hlayiso.com/grade-11/life-sciences/notes/population-ecology) - [Population Size & Growth Curves](https://www.hlayiso.com/grade-11/life-sciences/notes/population-ecology/population-size-and-growth-curves) - [Interactions in the Environment](https://www.hlayiso.com/grade-11/life-sciences/notes/population-ecology/interactions-in-the-environment) - [Human Population Growth & Predictions](https://www.hlayiso.com/grade-11/life-sciences/notes/population-ecology/human-population-growth-and-predictions) ### Human impact on the environment - [Human impact on the environment notes](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment) - [The Atmosphere & Climate Change](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment/the-atmosphere-and-climate-change) - [Water Availability & Quality](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment/water-availability-and-quality) - [Food Security & Loss of Biodiversity](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment/food-security-and-loss-of-biodiversity) - [Solid Waste Disposal & Recycling](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment/solid-waste-disposal-and-recycling) ### Photosynthesis - [Photosynthesis notes](https://www.hlayiso.com/grade-11/life-sciences/notes/photosynthesis) - [The Process of Photosynthesis](https://www.hlayiso.com/grade-11/life-sciences/notes/photosynthesis/the-process-of-photosynthesis) - [Factors Affecting Photosynthesis & Greenhouse Systems](https://www.hlayiso.com/grade-11/life-sciences/notes/photosynthesis/factors-affecting-photosynthesis-and-greenhouse-systems) ### Animal nutrition - [Animal nutrition notes](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition) - [Dentition in Herbivores, Carnivores & Omnivores](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition/dentition-in-herbivores-carnivores-and-omnivores) - [The Human Alimentary Canal & Digestion](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition/the-human-alimentary-canal-and-digestion) - [Absorption, Assimilation & Egestion](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition/absorption-assimilation-and-egestion) - [Homeostatic Control of Blood Sugar Levels](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition/homeostatic-control-of-blood-sugar-levels) ### Respiration - [Respiration notes](https://www.hlayiso.com/grade-11/life-sciences/notes/respiration) - [Aerobic Respiration](https://www.hlayiso.com/grade-11/life-sciences/notes/respiration/aerobic-respiration) - [Anaerobic Respiration & Comparison](https://www.hlayiso.com/grade-11/life-sciences/notes/respiration/anaerobic-respiration-and-comparison) ## Frequently asked questions ### Are the Grade 11 Life Sciences notes free? Each Grade 11 Life Sciences note section has a free preview on Hlayiso. Create a free Hlayiso account to read the full notes on the web or in the app; the free plan has daily limits. ### Are the notes aligned with CAPS and the ATP? Yes. All Grade 11 Life Sciences notes are written against the official CAPS curriculum and ATP so you only study what’s examinable. --- Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.