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This is tolerated or even celebrated by passengers, although most public transportation systems only allow service animals and forbid pets. According to urban wildlife specialist Suzanne MacDonald, animal "commuters" are usually motivated by food and security available on the vehicle rather than its ability to take them to a destination. [1]
Oxygen-transport systems were long thought unnecessary in insects, but ancestral and functional hemocyanin has been found in the hemolymph. [3] Insect "blood" generally does not carry hemoglobin , although hemoglobin may be present in the tracheal system instead and play some role in respiration.
Transport (in British English) or transportation (in American English) is the intentional movement of humans, animals, and goods from one location to another. Modes of transport include air , land ( rail and road ), water , cable , pipelines , and space .
Thermodynamically the flow of substances from one compartment to another can occur in the direction of a concentration or electrochemical gradient or against it. If the exchange of substances occurs in the direction of the gradient, that is, in the direction of decreasing potential, there is no requirement for an input of energy from outside the system; if, however, the transport is against ...
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. [1] The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to ...
The transportation of animals is the intentional movement of non-human animals by transport. Common categories of animals which are transported include livestock destined for sale or slaughter; zoological specimens; laboratory animals; race horses; pets; and wild animals being rescued or relocated. Methods of transporting animals vary greatly ...
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Animal transporters are used to transport livestock or non-livestock animals over long distances. They could be specially-modified vehicles, trailers , ships or aircraft containers. [ 1 ] [ 2 ] While some animal transporters like horse trailers only carry a few animals, modern ships engaged in live export can carry tens of thousands.