Out of Context Textbook Diagrams Might Be My New Favorite Thing

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John Summers • Contributor
Aug 2, 2025 1:00 PM EDT

I'll be honest: one of the best parts of adulthood is never having to sit through a high school biology class again. Don't get me wrong, I still love learning stuff - I'm the kind of person who watches hour-long YouTube explainers for fun - but the traditional school system? It just never worked for me. The endless hours stuck in a fluorescent-lit room, memorizing facts from dusty textbooks that were probably written in the late '80s and updated exactly once? No thanks.

Which brings me to my new favorite internet obsession: out-of-context textbook diagrams. You know the ones. Someone posts a completely bizarre image from a real textbook with zero explanation, and you're left to piece together what on earth was going on. Like… why is this diagram of a raccoon labeled "Figure 4.7: The Emotion Wheel"? What does this sentence mean: "Gub-gubs go 'wooo': the relational network is completed"? Who approved this?

It's part mystery, part nostalgia, and part "what were they thinking?" And I'm obsessed. So here's a collection of truly unhinged textbook diagrams that make you realize maybe we did learn something in school - just not what the curriculum intended.

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  • 01
    虫類・両生類 カメ Turtle 私たち人間の胸部には心臓や肺などをか ゴのように囲む あばら骨があり ますが、カメはこれを心臓 肺などの重要なだけでなく、緊急 時には頭から足まで体全部を包み込める。 ほど大きく発達させています。 カメ人間 Turtle Kommu 10 Chapter 生館 How to カメ人間の作り方 のほとんどは どでできている もしも人間が その構造を リクガメ リクガメの格 持っていたら 肩甲骨 人間の み込む 完成! "
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  • 02
    Dopamine Levels DOPAMINE LEVELS: ANTICIPATION AND CRAVING Rat receives Rat sees Rat cocaine light Rat approaches button presses button injection Timeline
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  • 03
    An object in a mobius-strip-shaped universe would be indistinguishable from its own mirror image. This crab's larger claw switches between left and right with every circulation
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  • 04
    X, d) be a complete metric space, x = X, and B = (X). d(x, B) = Min{d(x, y): y = B}. distance from the point x to the set B. ret- ats re- The whole smiley face is a point in H(X). Call it xe H(X). This thin torso is a point in H(X). Call it ye H(X). This fellow is xuy. He is a single point in H(X).
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  • 05
    3+ W e. ta y FLEMING'S RIGHT HAND RULE
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  • 06
    A Jeep Wrangler is less aerodynamic than a lobster
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  • 07
    Overactive Thyroid 3 Broken lines indicate normal size of thyroid. Underactive Thyroid Broken lines indicate normal size of thyroid. Bulging eyes Face is thin from weight loss Swelling of neck (goiter) Puffiness under eyes Puffy face Dry skin
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  • 08
    Here's what an empty MHC molecule might look like from the viewpoint of the T cell receptor. Right away you see the groove into which the protein fragment would fit. Next, let's look at a fully-loaded, class I molecule:
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  • 09
    (A) Vertebral canal (B) Body movement Vertebra Fluid movement Glycogen body Spinal AL cord -Ligaments-
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  • 10
    Pluripotent stem cell Bone Marrow EPO ERYTHROPOIESIS Mature erythrocytes FIGURE 3.1 Through the erythropoietic process, a single pluripotent stem cell yields 16 mature erythrocytes. Circulation
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  • 11
    Conventional Maximal Multiple Minimal Pair Opposition Oppositions toes thick thing clothes throws tick ring slows
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  • 12
    Gluteus Maximus Gluteus Medius TFL Fish Diagram Fish
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  • 13
    3. Basic concepts 11 H R+u T+f Mc Ph Mt Ph Figure 9. Basic correspondences between the limb bones of the human and quadrupedal mammalian skeleton. Legend: S- scapula: H= humerus; R+u radius and ulna; Me= metacarpus; Ph= phalanges; P= pelvis; F-femur; T+f= tibia and fibula; Mt= metatarsus (Kolda 1936)
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  • 14
    TSE FIGURE 19 FIGURE 20 TSE
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  • 15
    undeformed translation rotation distortion
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  • 16
    Wind PS Ballooning fibers (aciniform silks & minor ampullate silk) AS Dragline (major ampullate silk)
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  • 17
    CHEMISTRY A EUROPEAN JOURNAL H DOI: 10.1002/chem.201101551 How Does Cu" Convert into Cu¹? An Unexpected Ring-Mediated Single- Electron Reduction [e] Davide Barreca,b] Ettore Fois, Alberto Gasparotto, Roberta Seraglia,[b] Eugenio Tondello,el and Gloria Tabacchi*[a] Cull Cu¹ 10864 WILEY ©2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Chem. Eur. J. 2011, 17, 10864-10870. ONLINE LIBRARY
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  • 18
    R 02022 Cherens ights reserved.
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  • 19
    METAL METAL METAL METAL METAL METAL METALLOTHIONEIN METAL METAL METAL www METAL
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  • 20
    Cheezburger Image 10537280000
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  • 21
    Intestines Intestines
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  • 22
    What does this drawing of a person say about the child who drew it? According to research, not much: The Draw-a-Person test is not very predictive. Courtesy of Elizabeth Louden
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  • 23
    FIG. 29.25. Method of moving an aggressive adult ostrich with three or four people; a fourth person may be needed-one on each side, one behind, and one at the head.
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  • 24
    C Fig. 1. The underpant worn by the rat.
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  • 25
    Boops boops Boops boops in a bucket. Conservation status Extinct Threatened Least Concern EX EW CR EN VU (NT LC Least Concern (IUCN 3.1) [1]
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  • 26
    5. -13 points OSColPhys2016 9.3.P.011 Consider the following figure. F W CG
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  • 27
    elation <<---- F--. and d Gub-Gub Derived Relations edT Wooo Figure 2.3: Gub-gubs go "wooo": the rela- tional network is completed.
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  • 28
    09 Kennedy in a Dog
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