NCERT Class 10 Science Chapter 6 PDF – Control and Coordination Free Download

Chapter 6 of Class 10 Science, titled Control and Coordination, explains how our body and other living organisms perform complex functions with the help of their nervous and endocrine systems. It introduces the concepts of coordination in animals and plants, focusing on how responses are controlled, how sense organs work, and how hormones regulate activities inside our body. From reflex actions to the role of hormones like adrenaline and insulin, this chapter gives a clear picture of internal regulation in living beings.

I’m writing about this topic because many students find this chapter confusing due to its mix of biology and physiology. It introduces terms like neurons, synapse, stimulus, feedback mechanism, and plant hormones, which need clear understanding rather than rote learning. This chapter often includes diagram-based questions and short as well as long answer questions in board exams. That’s why having a reliable PDF copy of this chapter is helpful — for revising concepts, labelling diagrams correctly, and brushing up points quickly before the exam. I’ve seen that once students understand how control and coordination actually work, especially in humans, the chapter becomes really interesting and scoring.

What’s Covered in Chapter 6: Control and Coordination

This chapter is divided into two broad areas — coordination in animals and coordination in plants. Below is a simple breakdown:

Coordination in Animals

Nervous System
- Structure of neuron
- Reflex action and reflex arc
- Human brain (cerebrum, cerebellum, medulla)
- Transmission of signals
Hormonal Coordination
- Endocrine glands and hormones
- Functions of hormones like insulin, adrenaline, thyroxine, growth hormone
- Feedback mechanism

Coordination in Plants

Movements in Plants
- Tropic movements (Phototropism, Geotropism, Hydrotropism, etc.)
- Nastic movements (touch-sensitive movements like in Mimosa pudica)
Plant Hormones (Phytohormones)
- Auxins, Gibberellins, Cytokinins, Abscisic Acid, Ethylene

This chapter also includes labelled diagrams of the neuron, human brain, and reflex arc, which are essential for exam preparation.

Why Understanding This Chapter Is Important

Diagrams like human brain and neuron are repeatedly asked in CBSE board exams
Conceptual questions based on hormonal disorders or reflex actions are commonly included
Forms a strong base for biology topics in Class 11 and for NEET
Enhances understanding of how both animals and plants adapt and survive using internal systems

During my own Class 10 preparation, I remember struggling with terms like synapse and feedback mechanisms. But once I began drawing the diagrams and relating the concepts with daily life examples — like how our hand pulls back instantly from a hot surface (reflex) — it made perfect sense. This chapter is not just theoretical but very relatable too.

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Click here to download NCERT Class 10 Science Chapter 6: Control and Coordination PDF

NCERT Class 11 History Chapter 3 PDF (Hindi): यायावर साम्राज्य

Chapter 3 of Class 11 History (Hindi Medium), यायावर साम्राज्य, introduces us to the powerful nomadic groups who lived on grasslands and shaped world politics through their mobility and warfare skills. Unlike settled civilizations, these groups did not build fixed cities. Instead, they lived in tents, moved across open steppe lands, and controlled vast territories using trained cavalry, swift horses, and disciplined armies. This chapter mainly focuses on the Mongols and the rise of the great leader Genghis Khan, who built one of the largest empires in world history.

The Mongols break this idea completely; they ruled not through stone buildings but with strategy, speed, and unity. They controlled long trade routes like the Silk Road, protected traveling merchants, and brought different cultures in contact with each other. Even though they were feared for their battles, they also encouraged trade, promoted communication, and created connections between Europe and Asia. This chapter helps us realise that history is not only written in monuments, but also in movement, leadership, and cultural exchange. Understanding the nomadic empire changes our view of how societies grow without cities and how mobility can be a source of power.

About Chapter 3: यायावर साम्राज्य

This chapter explains who nomads were, how they lived, how they organized themselves, and how they built one of the most influential empires.

Who Were the Nomads?

Nomads were communities that moved from one place to another instead of settling permanently. They traveled with:

Herds of sheep, horses, goats, camels
Portable tents (known as yurts)
Weapons designed for horseback combat

Rise of Genghis Khan

Genghis Khan, originally named Temujin, united different Mongol tribes and became a legendary leader.

Leader	Contribution
Genghis Khan	United tribes, created military discipline, expanded the empire through conquests
Ögedei Khan	Strengthened administration, continued expansion
Mongke and Kublai Khan	Controlled trade, governed China, expanded diplomacy