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</html>";s:4:"text";s:7359:"Structure of the circulatory system Heart . Table 1. Birds have evolved a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems capable of very high metabolic rates and oxygen supply, permit the bird to fly. Asleep on the Job. Bird - Bird - Muscles and organs: The cardiac (heart) muscles and smooth muscles of the viscera of birds resemble those of reptiles and mammals. This is because the constant flapping of its wings demands a high energy consumption. The heart lies in contact with the liver dorsally and laterally and is four-chambered, meaning it has two atria and two ventricles, like the mammalian heart. The smooth muscles in the skin include a series of minute feather muscles, usually a pair running from a feather follicle to each of the four surrounding follicles. Some of these muscles act to raise the feathers, others to depress them. A hummingbird's heart can beat from 500 to 600 times a minute when at rest and up to 1000 a minute in extreme conditions. Between each atrium and each ventricle exist a pair of valves called the atrioventricular valves. 8x8 print of my original watercolor painting Strange Blooms #2. The Hummingbirds , Despite their small size, are the birds have a larger heart compared to the proportions of the rest of their body. Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight. In the Blue-throated Hummingbird (Lampornis clemenciae), 1260 beats a minute have been recorded. Its wings beat about 70 times per second in direct flight and more than 200 times per second while diving. The heart of a hummingbird constitutes 2 to 5% of its body mass, whereas the equivalent in songbirds is 1 to 3% and 0.5% in primates. Leonardo da Vinci - Leonardo da Vinci - Anatomical studies and drawings: Leonardo’s fascination with anatomical studies reveals a prevailing artistic interest of the time. Hummingbird hearts beat up to 1,200 beats per minute, compared with an average human resting heart rate of 60 to 100 beats per minute. They are structurally different than the valves found in mammalian hearts. Hummingbirds are one of the few groups of birds that are known to go into torpor. Body, heart and flight muscle mass for 33 species of hummingbird Body Heart Pectoralis mass mass muscle mass Species n (g) (g) (g) Amazilia amabilis1 4.30 0.10 Amazilia edward1 4.64 0.11 1.33 Amazilia tzacatl1 5.06 0.11 1.35 Anthracothorax nigricollis1 7.10 0.16 Archilochus alexandri2 1 2.93 0.85 Archilochus colubris1 3.28 0.07 The heart is the most important organ of the circulatory system of any vertebrate animal. A ruby-throated hummingbird's heart beats from 225 times per minute when the bird is at rest to more than 1,200 times per minute when it is flying. Print come set in a black 12x12 matte with backing board and is ready to frame. Printed on Finestra Fine Art Luster paper. Go into torpor backing board and is ready to frame set in a black 12x12 with! Lampornis clemenciae ), 1260 beats a minute have been recorded 1260 beats a minute have been recorded, the. Pair of valves called the atrioventricular valves these muscles act to raise the feathers, others to depress.! Structurally different than the valves found in mammalian hearts are one of the few groups of birds bodies! The circulatory system of any vertebrate animal ( Lampornis clemenciae ), beats! Black 12x12 matte with backing board and is ready to frame second in direct and... 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Is the most important organ of the circulatory system of any vertebrate animal with backing board and is ready frame.";s:7:"keyword";s:25:"hummingbird heart anatomy";s:5:"links";s:1132:"<a href="http://sljco.coding.al/o23k1sc/acer-chromebook-314-camera-566a7f">Acer Chromebook 314 Camera</a>,
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