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Bookmark or Share- Why don't mammals have more than 4 limbs? - Biology Stack ExchangeNumber of legs in terrestrial vertebrates. Not only do mammals have four legs but actually all terrestrial vertebrates (which include mammals) have four legs. There are slight exceptions though as some lineages have lost their legs. Typically snakes have no legs anymore. Apesteguia and Zaher (2006) discuss the evolution of snakes legs reduction ...
- What is the anatomical term for a two jointed leg? - zoologyI'm wondering what the anatomical term for a cat- or a goat-style hind leg is. Cats, goats, t-rexes, and many many other animals don't have human hind legs (i.e., with one knee / one pivot point). They have two pivot points, with one bone going down, then another going back-ish, then another going down again.
- Why do adult insects have 6 legs? - Biology Stack Exchange18. Short answer. Six legs allow for locomotion, while maintaining a supportive tripod at all times. Background. There are several million species of insects, all on 6 legs. This implies that any change in this number is promptly selected against. It is generally agreed that insects were derived from many-legged ancestors, e.g. centipedes.
- anatomy - How come large herbivores have such thin legs? - Biology ...Large grazing mammals such as horses, moose, and cows tend to have relatively thin legs despite being up to ~1000kg. For example, this rider's and her horse's legs appear to have about the same cross-sectional area both for below and above the "knee": If this horse is 500 kg (a mid-range mass for horses), each leg would have to support 125 kg ...
- entomology - Can a grasshopper jump with so much force that it could ...Our results show that the fracture toughness of cuticle in locust hind legs is 4.12 MPa m(1/2) and decreases with desiccation of the cuticle. Can someone explain what that measurement is? I type "4.12 MPa m(1/2)" into Google, and this comes up: Is this the conversion to something?
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