Janjucetus NT small
Relevantní obrázky
![](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Ambulocetus_model_and_skeletal_restoration.jpg/400px-Ambulocetus_model_and_skeletal_restoration.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Scars_from_cookie-cutter_shark_bites_on_Gray%27s_beaked_whale.jpg/125px-Scars_from_cookie-cutter_shark_bites_on_Gray%27s_beaked_whale.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Zoologisches_Museum_Kiel_Pottwal-Skelett.jpg/250px-Zoologisches_Museum_Kiel_Pottwal-Skelett.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Recherches_pour_servir_à_l%27histoire_naturelle_des_mammifères_%28Pl._80%29_%28white_background%29.jpg/250px-Recherches_pour_servir_à_l%27histoire_naturelle_des_mammifères_%28Pl._80%29_%28white_background%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Baleine_à_bosse_et_son_baleineau_2.jpg/250px-Baleine_à_bosse_et_son_baleineau_2.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Pseudorca_crassidens_flipper_bones_-_Burke_Museum_-_01.jpg/400px-Pseudorca_crassidens_flipper_bones_-_Burke_Museum_-_01.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Queen%27s_Megaron_with_dolphins_Knossos_Palace.jpg/250px-Queen%27s_Megaron_with_dolphins_Knossos_Palace.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Lagenorhynchus_albirostris_-_skeleton.jpg/400px-Lagenorhynchus_albirostris_-_skeleton.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Bowhead_Whale_flensing%2C_Barrow%2C_Alaska%2C_October_2017.jpg/250px-Bowhead_Whale_flensing%2C_Barrow%2C_Alaska%2C_October_2017.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/09/Delphinapterus_leucas_head_1.jpg/250px-Delphinapterus_leucas_head_1.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/The_Childrens_Museum_of_Indianapolis_-_Killer_whale_skull_cast.jpg/250px-The_Childrens_Museum_of_Indianapolis_-_Killer_whale_skull_cast.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Eubalaena_glacialis_%28North_Atlantic_right_whale%29_1_%2830986325841%29.jpg/250px-Eubalaena_glacialis_%28North_Atlantic_right_whale%29_1_%2830986325841%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Livyatan_melvillei_skull.jpg/250px-Livyatan_melvillei_skull.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Pakicetus_fossil.png/400px-Pakicetus_fossil.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Remingtonocetus_outline.png/250px-Remingtonocetus_outline.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Young_Male_Humpback_Whale-Megaptera_novaeangliae_%2816819905665%29.jpg/400px-Young_Male_Humpback_Whale-Megaptera_novaeangliae_%2816819905665%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/6/61/EB1911_Cetacea_-_Fig._5.—Skull_of_a_Beaked_Whale_%28Mesoplodon_densirostris%29.jpg/400px-EB1911_Cetacea_-_Fig._5.—Skull_of_a_Beaked_Whale_%28Mesoplodon_densirostris%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Cladogram_of_Cetacea_within_Artiodactyla_%28Camelus_bactrianus%29.png/250px-Cladogram_of_Cetacea_within_Artiodactyla_%28Camelus_bactrianus%29.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/29/Squalodon_calvertensis_skull.jpg/400px-Squalodon_calvertensis_skull.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Killer_Whales_Hunting_a_Crabeater_Seal.jpg/250px-Killer_Whales_Hunting_a_Crabeater_Seal.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/28/Cladogram_of_Cetacea_within_Artiodactyla.png/125px-Cladogram_of_Cetacea_within_Artiodactyla.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/FMIB_35789_Modern_Whaling_Cannon_Loaded_with_Harpoon%2C_and_Ready_to_Fire.jpeg/250px-FMIB_35789_Modern_Whaling_Cannon_Loaded_with_Harpoon%2C_and_Ready_to_Fire.jpeg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Humpback_whale_bubble_net_feeding_Christin_Khan_NOAA.jpg/250px-Humpback_whale_bubble_net_feeding_Christin_Khan_NOAA.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Whaling_in_the_Faroe_Islands.jpg/250px-Whaling_in_the_Faroe_Islands.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Heart_of_a_Minke_whale_%28Balaenoptera_acutorostrata%29.jpg/250px-Heart_of_a_Minke_whale_%28Balaenoptera_acutorostrata%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Recent_memoirs_on_the_Cetacea_pl._2.jpg/250px-Recent_memoirs_on_the_Cetacea_pl._2.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Indohyus_BW.jpg/400px-Indohyus_BW.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Dolphins_jumping_qtl1.jpg/250px-Dolphins_jumping_qtl1.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Ganges_River_Dolphin.jpg/250px-Ganges_River_Dolphin.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Eschrichtius_robustus_NOAA.jpg/400px-Eschrichtius_robustus_NOAA.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Walia_ibex_illustration_white_background.png/250px-Walia_ibex_illustration_white_background.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Delphinapterus_leucas_NOAA.jpg/1000px-Delphinapterus_leucas_NOAA.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/29/Killer_Whale_%28Orcinus_orca%29_%2816686617207%29.jpg/250px-Killer_Whale_%28Orcinus_orca%29_%2816686617207%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Humpback_whale_with_her_calf.jpg/400px-Humpback_whale_with_her_calf.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Anim1122_-_Flickr_-_NOAA_Photo_Library.jpg/250px-Anim1122_-_Flickr_-_NOAA_Photo_Library.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Subadult_female_spectacled_porpoise.png/400px-Subadult_female_spectacled_porpoise.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Hippopotamus-PSF-Oksmith.svg/250px-Hippopotamus-PSF-Oksmith.svg.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/72/Balaena_mysticetus_NOAA.jpg/400px-Balaena_mysticetus_NOAA.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Blue_whale_size.png/400px-Blue_whale_size.png)
Relevantní články
KytovciKytovci (Cetacea) jsou podskupinou (infrařádem) sudokopytníků přizpůsobenou k životu v moři. Jejich sesterskou skupinou jsou hrochovití. Kvůli výrazným anatomickým a fyziologickým adaptacím na vodní způsob života je jejich evoluční souvislost se suchozemskými savci dosti zastřená a donedávna byli považováni za samostatný řád. Mezi jejich nejnápadnější znaky související s přechodem do vody patří přeměna předních končetin v ploutve a vymizení zadních končetin, vznik horizontální (vodorovné) ocasní ploutve, která je hlavním orgánem pohybu, ztráta srsti, ztráta vnějšího ucha, získání hydrodynamického vřetenovitého tvaru těla a další. Typicky savčím projevem je jejich potřeba dýchat vzduch. Někteří kytovci sice mohou pod vodou vydržet i přes dvě hodiny, ale nakonec se nadechnout musí. Nozdry jsou posunuty v podstatě na temeno hlavy, lebka je touto tzv. teleskopizací oproti lebce jiných savců silně modifikovaná. .. pokračovat ve čtení