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The spiral has polar slope 2ln(ρ)/π, where ρ satisfies ... Nautilus shell and plastic spiral, with ρ the positive root of x^3 = x + 1: Width: 2240: Height: 1680
Nautilus half-shell showing the camerae in a logarithmic spiral Section cut of a nautilus shell A nautilus shell viewed from above (left), and from underneath (right) Nautili are the sole living cephalopods whose bony body structure is externalized as a planispiral shell .
The chambered nautilus (Nautilus pompilius), also called the pearly nautilus, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top. This ...
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English: Diagram of the anatomy of an adult female Nautilus pompilius depicting the digestive, reproductive, and some of the circulatory, nervous, and muscular systems. Français : Diagramme de l'anatomie d'une femme adulte Nautilus pompilius représentant les systèmes digestif, reproducteur et certains des systèmes sanguin, nerveux et ...
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc. The term aperture is used for the main opening in gastropod shells, scaphopod shells, and also for Nautilus and ammonite shells.
If you've been having trouble with any of the connections or words in Monday's puzzle, you're not alone and these hints should definitely help you out. Plus, I'll reveal the answers further down ...
Cutaway of a nautilus shell showing the chambers arranged in an approximately logarithmic spiral. The plotted spiral (dashed blue curve) is based on growth rate parameter b = 0.1759 {\displaystyle b=0.1759} , resulting in a pitch of arctan b ≈ 10 ∘ {\displaystyle \arctan b\approx 10^{\circ }} .