book lungs
Spider breathing organs
Book lungs are respiratory organs found in spiders and some other arachnids, consisting of stacked plate-like folds of tissue resembling pages in a book.
Air circulates between these thin membranes, allowing oxygen exchange with the blood.
The structure is an adaptation for breathing air rather than water.
Web-spinning eight-legged creatures
- scorpionsVenomous tailed arachnids
- tarantulaLarge hairy spider
- vinegaroonArachnid spraying acetic acid
- cephalothoraxFused cranial-trunk section
exoskeleton · molting · eight-legged · predator · venom · arthropod · invertebrate · arachnid
Thin parallel plates
- gas exchangeTransfer of respiratory molecules
- spiraclesExternal respiratory apertures
- operculumAnatomical lid structure
- air sacsGas-exchange lung cavities
diffusion · oxygen · carbon dioxide · respiration · ventilation · tissue · chitin · abdomen
Fitting to new conditions
- SilurianPaleozoic period, mid-range
- DevonianGeologic period, 419-359 million years ago
- CarboniferousCoal-depositing geological period
- fossilsPreserved ancient organism traces
paleontology · ancestral · phylogeny · diversification · oxygenation · morphology · natural selection · speciation
spiders
Web-spinning eight-legged creatures
- scorpionsVenomous tailed arachnids
- tarantulaLarge hairy spider
- vinegaroonArachnid spraying acetic acid
cephalothorax · exoskeleton · molting · eight-legged · predator · venom · arthropod · invertebrate · arachnid
lamellae
Thin parallel plates
- gas exchangeTransfer of respiratory molecules
- spiraclesExternal respiratory apertures
- operculumAnatomical lid structure
air sacs · diffusion · oxygen · carbon dioxide · respiration · ventilation · tissue · chitin · abdomen · aerobic
adaptation
Fitting to new conditions
- SilurianPaleozoic period, mid-range
- DevonianGeologic period, 419-359 million years ago
- CarboniferousCoal-depositing geological period
fossils · paleontology · ancestral · phylogeny · diversification · oxygenation · morphology · natural selection · speciation
book lungstracheae
Main airways in throats
gills · lungs · spiracles · swim bladder
book, booking, lung, lungs, booklet, lungful, lungfish, pulmonology, pulmonologist