All simulations · Class 11 · Zoology

Class 11 Zoology simulations

30 free interactive Class 11 Zoology simulations covering 9 NCERT chapters, including Neural Control and Coordination, Excretory Products and their Elimination, Body Fluids and Circulation. Change the variables, watch the result, and learn for school exams, JEE Main and NEET.

Open the Physica lab

Neural Control and Coordination (4 simulations)

• Nerve impulse: the action potential — Stimulate an axon. If the stimulus reaches threshold, Na⁺ rushes in and a full action potential travels…
• Myelinated vs non-myelinated fibres — Compare how fast impulses travel: continuously along a bare axon or jumping from node to node of Ranvier.
• Reflex arc: the knee jerk — Tap the patellar tendon. The impulse runs in through a sensory neuron and straight out through a motor…
• Transmission across a chemical synapse — An impulse arrives at the axon terminal: synaptic vesicles release neurotransmitter, which crosses the cleft…

Excretory Products and their Elimination (3 simulations)

• ADH and water balance — Drink more or less water and see the hypothalamus adjust ADH, changing urine volume and concentration.
• Counter-current mechanism — Move a probe down the loop of Henle and read the osmolarity of the medullary interstitium.
• Nephron: filtration and reabsorption — Trace filtrate from the glomerulus through the tubule. Nearly all of it is reabsorbed.

Body Fluids and Circulation (4 simulations)

• Blood groups and transfusion — Pick a donor and a recipient. See the antigens on donor red cells and the antibodies in the recipient’s…
• The cardiac cycle — Watch the heart’s chambers contract and relax in sequence and hear when the valves close (lub, dub).
• Double circulation — Follow red blood cells through the pulmonary circuit (heart–lungs) and the systemic circuit (heart–body).
• Electrocardiogram (ECG) — Read an ECG trace: P wave, QRS complex and T wave. Count QRS complexes to find the heart rate.

Animal Kingdom (4 simulations)

• Body symmetry — Rotate a cutting plane through each animal. Does it give two identical (mirror) halves?
• Chordates vs non-chordates — Look inside a transparent body and compare the five key differences between chordates and non-chordates…
• Germ layers and the body cavity — Slice through four body plans and see the germ layers and whether a body cavity (coelom) is present.
• Phylum explorer — Spin through the major animal phyla and compare their key features (NCERT Table 4.2).

Breathing and Exchange of Gases (4 simulations)

• Mechanism of breathing (bell-jar model) — Pull the rubber diaphragm down: the volume of the jar increases, pressure falls and the balloons (lungs)…
• Exchange of gases: partial pressures — Follow blood along a pulmonary or tissue capillary and watch O₂ and CO₂ diffuse down their partial-pressure…
• Spirometer: lung volumes and capacities — Breathe normally, then take a maximum breath in and out. Read the volumes and capacities from the spirogram.
• Oxygen–haemoglobin dissociation curve — See how the % saturation of haemoglobin depends on pO₂, and how CO₂, acidity and temperature shift the curve.

Structural Organisation in Animals (2 simulations)

• Cockroach: organ systems — Explore a cockroach (Periplaneta americana) and highlight each organ system in turn.
• Epithelial tissues — Build sheets of epithelium from flat, cube-shaped or tall cells, with or without cilia.

Chemical Coordination and Integration (3 simulations)

• Map of endocrine glands — Locate the endocrine glands in the body and see the main hormones each secretes.
• Insulin, glucagon and blood glucose — Eat a meal and watch insulin from β-cells bring blood glucose back down; glucagon from α-cells raises it…
• Thyroid feedback and iodine — Reduce dietary iodine. Less thyroid hormone is made, TSH rises by negative feedback and the thyroid enlarges…

Biomolecules (3 simulations)

• Temperature and pH affect enzymes — Change temperature and pH and watch an enzyme’s activity rise to an optimum and then fall.
• Enzyme action and competitive inhibition — Raise the substrate concentration and see the reaction rate level off. Add a competitive inhibitor and…
• Levels of protein structure — Fold a protein from its amino acid sequence to a helix, a 3D globule and finally a multi-subunit protein.

Locomotion and Movement (3 simulations)

• The human skeleton: 206 bones — Highlight parts of the axial and appendicular skeleton and count their bones.
• Sliding filament theory — Contract a sarcomere: thin actin filaments slide over thick myosin filaments, pulling the Z lines together.
• Synovial joints — Move five kinds of synovial joint and see which directions each allows.