Radius

radius
The anterior bone in the lower part of the forelimb of vertebrates.
Covered in Lab 13 Animal Diversity III ...
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[L. radius, a spoke of a wheel + Gk. summetros, symmetry]
Characterizing a body shaped like a pie or barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
radiation ...
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h0
is the radius of the sphere,
m2
is the mass of the sphere, and G is the gravitational constant.
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→ Atomic radius decreases → Ionization energy increases → Electronegativity increases →
Group
1 ...
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Where
h0
is the radius of the sphere, M is the mass of the sphere, and G is the gravitational constant.
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Many other such allometric scaling laws are known which relate lengths (such as the radius of the aorta, genome size) and time-scales (heart-rate, lifespan, reaction rates) to mass.
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Primates have modifications to their ulna and radius (bones of the lower arm) allowing them to turn their hand without needing to turn their elbow. Many primates can also swivel or turn their arms at the shoulder.
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bone that together with the radius forms the forearm
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
What Topic Is Your BIOLOGY Paper On?
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When mice were bred with homozygous mutations for both HoxA11 and HoxD11, they were born with neither radius nor ulna in the forelimbs.
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radial cut A longitudinal section cut along a radius.
radial micellation Reinforcement of the cell wall of guard cells in specific regions such that the cells curve outward when fully turgid.
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AdaptiveRadiation the process of a species spreading into and making use of a new environment
(ad = to toward; apt = fasten adjust fix; radia = spoke ray radius) ...
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