Cirrus (biology)

Definition

In biology, a cirrus is a long, thin structure in an animal similar to a tentacle but generally lacking the tentacle's strength, flexibility, thickness, and sensitivity.

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Acarology Alfred Russel Wallace Allometry Ambulacraria Amphibian anatomy Anatomical plane Anatomical terminology Anatomical terms of location Anatomical variation Anatomy Animal Annelid Anthrozoology Arachnology Arteries Arthropod Arthropod cuticle Arthropodology Aschelminthes Bacterial cell structure Bacterial cellular morphologies Bacterial morphological plasticity Barnacle Batrachology Biological anthropology Bird anatomy Blood Blood vessel Body plan Brain morphometry Breathing Bryozoology Capillaries Carcinology Carl Linnaeus Cat anatomy Cellular respiration Cetology Chaenopsidae Charles Darwin Chordate Cirrus cloud Cnidaria Cnidariology Coleopterology Colonial morphology Comparative anatomy Conchology Connective tissue Crinoid Ctenophora Cynology Decapod anatomy Dog anatomy Elephant Entomology Epithelium Equine anatomy Ethnozoology Ethology External morphology of Odonata Feather star Felinology Fish anatomy Fish physiology Flatworm Form classification Fruit anatomy Gas exchange Gastropoda Georges Cuvier Giraffe Glossary of dinosaur anatomy Glossary of leaf morphology Glossary of plant morphology Gracility Gross anatomy Heart Helminthology Herpetology Hertwig rule Heteronemertea Hippology Histology History of anatomy History of anatomy in the 19th century History of zoology (1859–present)History of zoology through 1859 Human anatomy Ichthyology Index of anatomy articles Insect morphology Insect physiology Jakob von Uexküll Jean-Henri Fabre Karl Ernst von Baer Konrad Lorenz Lepidopterology Lichen morphology List of zoologists Lymph Malacology Mammal Mammal anatomy Mammalogy Melittology Mineralized tissues Molecular anatomy Mollusca Morphology (biology)Morphology of Diptera Morphometrics Muscle tissue Myriapodology Myrmecology Nautilus Neanderthal anatomy Nematology Nereididae Nervous tissue Neuroanatomy Neuroethology Notopodium Ophiology Ornithology Orthopterology Outline of zoology Paleozoology Parasitology Penis Physiognomy Physiology Placozoa Planktology Plant anatomy Plant habit Plant life-form Plant morphology Plant reproductive morphology Polychaete Primatology Respiration (physiology)Respiratory pigment Respiratory system Roughhead blenny Shark anatomy Sheep liver fluke Soil morphology Spider anatomy Sponge Standard anatomical position Superficial anatomy Taenia (flatworm)Tendril Tentacle Testudinology Teuthology Thomas Say Timeline of zoology Tissue (biology)Transcendental anatomy Vascular system Vein Vertebrate anatomy Water vascular system William Kirby (entomologist)Xenacoelomorpha Zooarchaeology Zoology

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