Summary: Study the six Class 11 physiology chapters in the order circulation, breathing, excretion, locomotion, neural control, chemical coordination, because each one uses ideas from the one before. Make one table per chapter for numbers and one for disorders, and link the Class 12 reproduction and health chapters to them in revision.Which chapters count as human physiology
In the current NEET syllabus, which follows the rationalised NCERT, human physiology in Class 11 covers six chapters: Breathing and Exchange of Gases, Body Fluids and Circulation, Excretory Products and their Elimination, Locomotion and Movement, Neural Control and Coordination, and Chemical Coordination and Integration. Digestion and Absorption was removed from the syllabus, so you can leave it out. In Class 12, Human Reproduction, Reproductive Health and Human Health and Disease are closely linked and are best revised alongside.
Students like these chapters because they are about their own bodies. The trouble is that liking a chapter makes you read it quickly. NEET questions from physiology go into exact values, the order of events and small exceptions, so the reading has to be slower than it feels necessary.
Why the order matters
NCERT arranges these chapters in its own order. For a first study, we prefer to start with circulation and move outward, because blood is the thread that ties everything together. Breathing makes more sense once you know how blood carries gases. Excretion needs the idea of filtration of blood. Locomotion introduces muscle contraction and calcium, which reappears in the nerve impulse and in hormone action. Hormones come last because they control all the earlier systems.
Chapter by chapter
Body Fluids and Circulation
Know the composition of blood and the functions of each formed element, the ABO and Rh systems, and the clotting cascade in outline. The heart is where most questions come from: the chambers and valves, the conducting system from the SA node to the Purkinje fibres, the cardiac cycle and its duration at 72 beats per minute, and what the P, QRS and T waves of an ECG represent. Learn the double circulation diagram well enough to trace a drop of blood through it.
Breathing and Exchange of Gases
The respiratory volumes and capacities are a favourite: tidal volume, inspiratory and expiratory reserve volumes, residual volume, and how capacities are built by adding volumes. Make sure you can calculate vital capacity and total lung capacity from given values. Then study the partial pressures of oxygen and carbon dioxide at each site, the oxygen dissociation curve and the factors that shift it, and the three ways carbon dioxide is carried.
Excretory Products and their Elimination
The nephron is the whole chapter in one diagram. Label every part, then write beside each part what is reabsorbed or secreted there. The counter-current mechanism, the role of ADH, the renin-angiotensin system and ANF are all regular question material. Add the disorders at the end and the role of the other organs in excretion.
Locomotion and Movement
Two halves: muscle and skeleton. For muscle, know the structure of a sarcomere with its bands and lines, and the steps of the sliding filament theory in order, including where calcium and ATP act. For the skeleton, learn the bone counts in each region, the types of joints with examples, and the disorders. The numbers are easy marks if you revise them often and easy losses if you do not.
Neural Control and Coordination
The resting potential and action potential, with the movement of sodium and potassium ions, need a clear understanding more than memory. After that come the synapse, the parts of the brain and their functions, and the reflex arc. The rationalisation of NCERT changed the sense organs part of this chapter, so compare your current edition with the NMC syllabus before deciding how much of the eye and ear to study.
Chemical Coordination and Integration
This chapter is almost entirely a table. For every hormone you should know the gland, the chemical nature, the target and action, and the disorder of excess or deficiency. The mechanism of hormone action (membrane receptors and second messengers versus intracellular receptors) is a common conceptual question.
Two tables to keep for every chapter
Make these in a thin notebook as you go, one page per chapter. You will revise from them far more than from anything else.
- Numbers table: every value in the chapter with its unit, for example cardiac output, residual volume, glomerular filtration rate, the number of bones in a region, and the durations in the cardiac cycle.
- Disorders table: the name, the cause in one line, and the organ or hormone involved. NEET often asks you to match a disorder with its cause.
When a number in a test question surprises you, do not stop at correcting it. Open NCERT, find the line and copy it into your numbers table with the page number.
A seven-week plan
This works for a first study in Class 11 alongside classes, or for a focused revision block in Class 12. Each week assumes about an hour a day for physiology.
| Week | Chapter | Output by the end of the week |
|---|---|---|
| 1 | Body Fluids and Circulation | Heart and ECG diagrams drawn from memory; numbers table |
| 2 | Breathing and Exchange of Gases | Volume and capacity calculations; dissociation curve with shifts |
| 3 | Excretory Products | Labelled nephron with reabsorption notes; ADH and RAAS flow chart |
| 4 | Locomotion and Movement | Sarcomere diagram; sliding filament steps; bone counts |
| 5 | Neural Control | Action potential sequence; brain parts table |
| 6 | Chemical Coordination | Full hormone table with disorders |
| 7 | Mixed revision | Two full physiology tests; every wrong answer traced to NCERT |
In each week, spend the first four days on reading and marking, the fifth on MCQs, and the last two on a chapter test and correction. Our NEET Biology chapter notes have a page for each of these chapters, for example Body Fluids and Circulation and Neural Control and Coordination.
Traps we see every year in class
- Mixing up which blood vessel carries oxygenated blood in the pulmonary circuit.
- Adding the wrong volumes to get a capacity.
- Placing reabsorption of a substance in the wrong segment of the nephron.
- Confusing the A band and I band, or what shortens during contraction.
- Swapping the hormones of the anterior and posterior pituitary.
- Remembering a disorder but not whether it comes from excess or deficiency of a hormone.
Linking to Class 12
When you reach Human Reproduction in Class 12, the hormones from Chemical Coordination come back in the menstrual cycle and pregnancy. Human Health and Disease leans on your knowledge of blood and immunity. Revise the Class 11 hormone table the week before you start reproduction, and the chapters will feel much lighter.
Common questions
Is Digestion and Absorption in the NEET syllabus?
No. It was removed when the NMC revised the syllabus to match the rationalised NCERT. Check the NMC notice for your year to be sure.
Which physiology chapter is the most difficult for NEET?
Students usually find Neural Control hardest to understand and Chemical Coordination hardest to remember. Both improve with a clear sequence diagram and a hormone table revised every week.
Do I need reference books beyond NCERT for physiology?
NCERT is the source of most questions. A reference book helps with practice questions and clearer explanations, but the numbers and statements you learn should match NCERT.