# Excretion notes

> CAPS-aligned study notes for Excretion in Grade 11 Life Sciences. Browse the sections below for explanations, worked examples and exam preparation.

- Page: https://www.hlayiso.com/grade-11/life-sciences/notes/excretion

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## Sections in Excretion

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- [Excretory Organs & Their Functions](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/excretory-organs-and-their-functions) — Excretory Organs & Their Functions Every cell in the human body produces metabolic waste products that must be removed to maintain a stable internal environment. The process of removing these…
- [The Urinary System & Kidney Structure](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/the-urinary-system-and-kidney-structure) — The Urinary System & Kidney Structure The urinary system (also called the renal system) is the body's primary system for removing nitrogenous wastes and regulating water and salt balance. It consists…
- [The Nephron & Urine Formation](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/the-nephron-and-urine-formation) — The Nephron & Urine Formation The nephron is the functional unit of the kidney. Each kidney contains approximately one million nephrons, and it is within these microscopic tubules that urine is…
- [Homeostatic Control of Water & Salts](https://www.hlayiso.com/grade-11/life-sciences/notes/excretion/homeostatic-control-of-water-and-salts) — Homeostatic Control of Water & Salts The human body must maintain a carefully balanced internal environment, including the concentration of water and dissolved salts in the blood and body fluids.…

## Other Life Sciences topics

- [Gaseous exchange](https://www.hlayiso.com/grade-11/life-sciences/notes/gaseous-exchange)
- [Biodiversity and classification of micro-organisms](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-and-classification-of-micro-organisms)
- [Biodiversity in plants and reproduction](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-plants-and-reproduction)
- [Biodiversity in animals](https://www.hlayiso.com/grade-11/life-sciences/notes/biodiversity-in-animals)
- [Population ecology](https://www.hlayiso.com/grade-11/life-sciences/notes/population-ecology)
- [Human impact on the environment](https://www.hlayiso.com/grade-11/life-sciences/notes/human-impact-on-the-environment)
- [Photosynthesis](https://www.hlayiso.com/grade-11/life-sciences/notes/photosynthesis)
- [Animal nutrition](https://www.hlayiso.com/grade-11/life-sciences/notes/animal-nutrition)
- [Respiration](https://www.hlayiso.com/grade-11/life-sciences/notes/respiration)

## Frequently asked questions

### What is covered in Excretion for Grade 11 Life Sciences?

The Excretion section covers all key concepts from the Grade 11 Life Sciences CAPS curriculum, including detailed explanations, worked examples, and exam preparation tips.

### Are the Excretion notes free?

Yes. Each section has a free preview, and a free Hlayiso account lets you read the full notes.

### How do these notes help with exam preparation?

Our Excretion notes are CAPS-aligned and include worked examples, common mistakes to avoid, and exam tips — everything you need to prepare for your Grade 11 Life Sciences exams.

### Are there quizzes for Excretion?

Yes. Hlayiso has quizzes for Excretion in Grade 11 Life Sciences. Test your understanding after reading the notes.

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