Cytoplasm & Organization

Run the cell interior

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Investigation

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37 °C
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Live measurements

Particle motion0.00 units/s
Vesicle transport0.00 units/s
Proteins packaged0

proteinvesicleorganelle

Camera & microscopic focus

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Tap an organelle, cytoskeletal fiber, ribosome, vesicle, or cytosol region.

Teacher demo tools

Motion history

Interactive teacher lecture

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What to watch

Start the lecture or choose a chapter. Spoken structures will be labelled, magnified, and animated.

Teacher transcript

The canvas will show each concept while it is narrated.

Lesson chapters

Learning objectives

  • Describe cytosol as a crowded, dynamic aqueous environment.
  • Identify major organelles and connect structure with function.
  • Trace proteins from ribosome to ER, Golgi, and vesicle.
  • Explain diffusion and motor-driven transport.
  • Relate cytoskeleton organization to cell shape and movement.

Key concepts

Cytoplasm includes cytosol, organelles, cytoskeleton, dissolved molecules, and suspended particles outside the nucleus. Organization comes from membranes, molecular recognition, gradients, and active transport along cytoskeletal tracks.

Particle sizes and travel times are visually scaled. Brownian motion and ATP-dependent motor behavior are educational approximations.

Suggested experiments

  1. Raise viscosity and compare diffusion speed.
  2. Lower temperature and observe Brownian motion.
  3. Set ATP to zero during motor transport.
  4. Increase ribosome activity in the secretory route.
  5. Tap each organelle to inspect its microscopic structure and function.

Applications and misconceptions

Intracellular organization supports secretion, energy production, waste recycling, signaling, cell division, and rapid directed delivery.

  • Cytoplasm is not empty water or featureless jelly.
  • Organelles interact through vesicles and contact sites.
  • Diffusion is random motion with net spreading.
  • Motor transport needs ATP and polarized tracks.

Visual concept quiz

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