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Biology sketches

Explore sketches, drawings, and illustrations that simplify ideas related to Biology.

Biceps, triceps and quadriceps: muscles drawing showing the 2, 3, and 4 connecting origins of each, respectivelyBiceps, triceps, quadriceps1.5 billion heartbeats illustration: showing how mammals share broadly the same number of heartbeats from a shrew to an elephant1.5 billion heartbeats in a lifetimeSquare cube law illustration with volume increasing faster than length and an elephant, an ant carrying a giant leaf and a child on the monkey bars as examplesThe Square-Cube lawWhat is the windscreen phenomenon explanation: showing a 1970 truck with bugs splattered on the windscreen and a 2017 with very few, reflecting, most likely a general decline in flying insectsThe Windscreen PhenomenonThe beard cycle illustration: a virtuous circle is shown where beards being rare in society (on the left) makes them more desirable which leads to beards becoming more common in society (on the right), making them less desirable, which leads to fewer beards again. And so on... The beard cycleSea jelly, sea starTypical gastropod anatomy: identifying the main parts of the shell of a common whelkTypical gastropod anatomywhat is a Phoenix tree explained with a toppled tree shown pencil-sketch style with its roots still connected at one end, side branches along the trunk becoming trees in their own right, and one putting down rootsPhoenix treesProprioception illustration: someone demonstrating to a police officer they aren't drunk as they can touch their nose with their eyes closed while standing on one legProprioceptionVenomous vs Poisonous the difference explained: Venomous animals inject venom through bites, stings and the like. Poisonous animals poison you if you absorb, consume, or inhale.Venomous, poisonous - what’s the difference?Animals that regenerate - flatworm head, axolotl legs, lizard tail, sea star, moose, deer...Animals that regenerateHomo sapiens. Our place in the order of thingsHow to tell a centipede from a millipedeCounter-shadingSleepy foodsWhat’s the difference between a crocodile and an alligatorIdentify a douglas fir: showing a douglas fir cone with it's 3 pointed mini-leaves named Dougie, Douglas and DougIdentify a Douglas firDarwin's 5 principles of natural selection: Reproduction, Excess, Variation, Selection, Divergence, illustrated in a tree of variation of childrenDarwin’s 5 principles of Natural SelectionCurly hair is oval illustration showing the cross-section of a hair follicle from oval to round and labelling it with curly, wavy, and straightCurly hair is ovalCore insect anatomyHard things to do with your other hand
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