science

Movement of Animals

Movement of Animals is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Movement of Animals rather than just read about it. In short: Movement of Animals (or On the Motion of Animals; Greek Περὶ ζῴων κινήσεως; Latin De Motu Animalium) is one of Aristotle's major texts on biology. It sets out the general principles of animal locomotion.

Key takeaways

Movement of Animals belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Movement of Animals to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Movement of Animals from memory before moving on to harder problems.

Reference excerpt

Movement of Animals (or On the Motion of Animals; Greek Περὶ ζῴων κινήσεως; Latin De Motu Animalium) is one of Aristotle's major texts on biology. It sets out the general principles of animal locomotion.

Pneuma All animals "possess an inborn spirit (pneuma sumphuton) and exercise their strength in virtue of it." (703a10). This inborn spirit is used to explain desire (orexis), which is classified as the "central origin (to meson), which moves by being itself moved." (703a5-6). Aristotle furthers this idea of being a "middle cause" by furnishing the metaphor of the movement of the elbow, as it relates to the immobility of the shoulder (703a13). The inborn pneuma is, likewise, tethered to the soul, or as he says here, tēn arche tēn psuchikēn, "the origin of the soul," the soul as the center of causality. This "spirit" is not the soul itself but a limb of the soul that helps it move. The inborn spirit causes movement in the body by expanding and contracting. Each of these implies not only a movement but also a change in the degree of power and strength of the animal. "when it contracts it is without force, and one and the same cause gives it force and enables it to thrust" (703a23). Compare this to the view that is developed in On Sleeping and Waking, namely, the view "that has been laid down that sense-perception originates in the same part of an animal's body as movement does. [...] In sanguineous animals this is the region about the heart; for all sanguineous animals possess a heart, and both movement and the dominant sense-perception originate there. As for movement, it is clear that breathing and in general the process of cooling takes its rise here, and that nature has supplied both breathing and the power of cooling by moisture with a view to the conservation of the heat in that part. We will discuss this later on. In bloodless animals and insects and creatures which do not respire, the naturally inherent breath is seen expanding and contraction in the part which corresponds to the heart in other animals" (456a1-13). "Since it is impossible to make any movement, or do any action without strength, and the holding of the breath produces strength" (456a17).

Editions and translations Works related to On the Movement of Animals at Wikisource On the Motion of Animals, translated by A. S. L. Farquharson Movement & Progression of Animals public domain audiobook at LibriVox De Motu and De Incessu Animalium, translated by A. S. L. Farquharson (Internet Archive) Martha Nussbaum, Aristotle's De Motu Animalium. Princeton University Press, 1978 ISBN 0691020353. Morison, Benjamin; Rapp, Christof; Primavesi, Oliver (2023). Aristotle, "De motu animalium". Oxford: Oxford University press. ISBN 9780198874461.

References

Worked examples

Example 1 — a first encounter with Movement of Animals

Start with the simplest possible case. Write down what Movement of Animals claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Movement of Animals before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Movement of Animals ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Movement of Animals

In research: Movement of Animals appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Movement of Animals in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Movement of Animals is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animal locomotion, Works by Aristotle, Zoology book stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Movement of Animals outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Movement of Animals in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Movement of Animals means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Movement of Animals out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Movement of Animals in simple terms?

Why does Movement of Animals matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Movement of Animals?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Movement of Animals.