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Structural Biochemistry/Cell Signaling Pathways/Circulatory System; Structural Biochemistry/Volume 2; Science: An Elementary Teacher’s Guide/The Human Body: The Circulatory System; The Organ Systems/circulatory; Learning anatomy/Vein; Learning anatomy/Printable version; Usage on en.wikiversity.org Commercial diving/Diving physiology
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A lymph heart is an organ which pumps lymph in lungfishes, amphibians, reptiles, and flightless birds back into the circulatory system. [1] [2] In some amphibian species, lymph hearts are in pairs, and may number as many as 200 in one animal the size of a worm, while newts and salamanders have as many as 16 to 23 pairs of lymph hearts. [2] [3]
The frog is triangular in shape. The frog is a part of a horse hoof, located on the underside, which should touch the ground if the horse is standing on soft footing. The frog is triangular in shape, and extends midway from the heels toward the toe, covering around 25% of the bottom of the hoof. [1] [page needed]
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [ 1 ] [ 2 ] It includes the cardiovascular system , or vascular system , that consists of the heart and blood vessels (from Greek kardia meaning heart , and Latin vascula meaning vessels ).
External view of a fetal pig. Fetal pigs are unborn pigs used in elementary as well as advanced biology classes as objects for dissection.Pigs, as a mammalian species, provide a good specimen for the study of physiological systems and processes due to the similarities between many pig and human organs.