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Birds also have specialized structures called air sacs closely associated with their lungs that store air when the animal inspires, further reducing body weight and maintaining the partial pressure of oxygen within the lungs equal to that of the surrounding environment. While highly beneficial for flight, decreasing body weight (and thus whole ...
Segmentation in biology is the division of some animal and plant body plans into a linear series of repetitive segments that may or may not be interconnected to each other. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda, Chordata, and Annelida. These three groups form ...
Animals have been hunted and farmed for their fur to make items such as coats and hats. [173] Dyestuffs including carmine , [174] [175] shellac, [176] [177] and kermes [178] [179] have been made from the bodies of insects. Working animals including cattle and horses have been used for work and transport from the first days of agriculture. [180]
There are 107 classes of animals in 33 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by no means be considered complete and authoritative and should be used carefully.
Most soft-bodied animals are small, but they do make up the majority of the animal biomass.If we were to weigh up all animals on Earth with hard parts against soft-bodied ones, estimates indicate that the biomass of soft-bodied animals would be at least twice that of animals with hard parts, quite possibly much larger.
The tamanduas are medium-sized species smaller than the giant anteater, with a total body length of around 0.77–1.33 m (2.5–4.4 ft) and a mass of 3.2–7.0 kg (7.1–15.4 lb). They can further be distinguished by their shorter snout, their relatively shorter claws, proportionately longer ears, and mostly fur-less, prehensile tail.
The double-blind testing apparatus was set up to avoid unconscious bias, particularly a Clever Hans effect, [14] in which humans unwittingly tip off their animal subjects through body language, facial expressions, or other means. Tests showed Washoe reliably used 85 signs singly and in combination with other words by her third year with the ...
The sublingua is found on the underside of the primary tongue in tarsiers, lemuriform primates, and some other mammals. The sublingua ("under-tongue") is a muscular secondary tongue found below the primary tongue in tarsiers and living strepsirrhine primates, which includes lemurs and lorisoids (collectively called "lemuriforms").