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Species
Species Overview
One of the most extraordinary mammals on Earthโa monotreme (order Monotremata, family Ornithorhynchidae) endemic to eastern Australia and Tasmania. Adults weigh 0.7โ2.4 kg with a body length of ~50 cm. They have dense, waterproof brown fur, a broad, flat, rubbery bill equipped with electroreceptors (detecting weak electric fields of prey in murky water), webbed feet, and a beaver-like tail for fat storage. Males have venomous spurs on the hind legsโone of few venomous mammals. They are semi-aquatic, inhabiting rivers and streams, and are excellent swimmers. They feed on aquatic invertebrates (insect larvae, worms, shrimp). Most remarkably, they are one of only five species of egg-laying mammals: females lay 1โ3 leathery eggs, incubating them for ~10 days. They lack teatsโmilk seeps through abdominal skin patches. Their genome reveals a mosaic of reptilian, avian, and mammalian genes (2n=52, with ten sex chromosomes: 5X + 5Y in males). Lifespan: up to 20+ years. IUCN: Near Threatened due to habitat degradation, drought, and climate change.
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Cellular Composition Explorer91Cell Types
Adrenergic neurons
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Adventitial cells
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Amacrine cells
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Bipolar cells
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Cholangiocytes
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Cone cells
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Corticotropes
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Cycling basal cells
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Cycling Cells
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Cycling ciliated cells
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Cycling epithelial cells
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Cycling glandular cells
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Cycling intermediate cells
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Cycling luminal epithelial cells
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Cycling stereociliated cells
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Descending limb of loop of Henle cells
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Effector chondrocytes
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Endoneurial cells
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Enteric neuronal progenitor cells
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Enteric neurons
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Eosinophils
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Ependymal cells
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Epineurial cells
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Epithelial cells
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Fasciculata cells
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Fibrocartilage chondrocytes
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Follicular cells
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Folliculostellate cells
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Ganglion cells
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Gastric epithelial cells
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Glandular cells
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Glial cells
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Glomerulosa cells
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Gonadotropes
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Granule cells
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Granulocytes
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Granulosa cells
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Homeostatic chondrocytes
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Horizontal cells
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Hypertrophic chondrocytes
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Inflammatory chondrocytes
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Lactotropes
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Luminal epithelial cells
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Melanotropes
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Mesenchymal cells
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Motor neurons
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Muller cells
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Myotendinous junctions
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Natural killer cells
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Natural killer T cells
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Neural crest cells
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Neural progenitor cells
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Neuromuscular junctions
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Neurons
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Oocytes
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Osteoblasts
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Osteoclasts
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Other stromal cells
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Oviduct epithelial cells
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Perineurial cells
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Pinealocytes
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Pre-hypertrophic chondrocytes
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Pre-inflammatory chondrocytes
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Precursor fibrocartilage chondrocytes
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Principal like cells
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Progenitor-like epithelial cells
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Proliferative chondrocytes
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Prostate progenitor cells
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Pseudostratified columnar cells
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Radial glial cells
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Regulatory chondrocytes
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Reparative chondrocytes
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Retinal pigmentary epithelial cells
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Rod cells
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Satellite cells
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Seminal vesicle epithelial cells
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Serous cells
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Skeletal myonuclei
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Somatotropes
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Squamous cells
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Stereociliated cells
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Supporting cells of vestibular epithelium
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Surface epithelial cells
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T_NKT cells
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Taste cells
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Tendon cells
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Theca cells
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Thyrotropes
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Type I myonuclei
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Type II myonuclei
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Vestibular dark cells
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Related Species in Other mammals
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