![]() Thus, the rules that govern scaling at the organ and cellular levels can differ even within a single population. Moreover, though mean facet diameter and facet number increased with body size, some colonies primarily increased facet number whereas others increased facet diameter, showing that the cellular level processes underlying organ scaling differed among colonies. ![]() However, both the slope and intercept of some allometric scaling relationships differed significantly among colonies. Workers’ eye area increased with body size in all the colonies showing a negative allometry. Here we study scaling in the compound eyes of workers of the wood ant, Formica rufa, from different colonies within a single population. Such scaling rules, typically studied from a limited sample, are assumed to apply to all members of a population and/or species. Organs scale with body size, a process known as allometry that has been studied extensively in a range of organisms. Accumulation of this liquid can cause glaucoma.Differential organ growth during development is essential for adults to maintain the correct proportions and achieve their characteristic shape. The aqueous humor is the liquid that helps supply nutrients to eye structures. The vitreous humor is a jelly-like material that helps the eye hold its shape. The choroid is the middle pigmented layer of the eye. The cornea is the transparent part of the sclera that lets light into the eye. The sclera is the tough layer that forms the white of the eye. The blind spot is the place where the optic nerve leaves the eye. The optic nerve is the structure that conducts action potentials to the brain. The fovea is the place where photoreceptors are highly concentrated. The retina is also the place where you would find rods and cones. ![]() The retina is the location of the eye's photoreceptors. The lens is the structure that changes shape to focus light on the retina. ![]() The ligament is a structure that puts tension on the lens, flattening it. The muscle is the structure that contracts or relaxes to alter the shape of the lens. The iris is the structure that contains muscles that make the pupil larger or smaller. The pupil is the opening that lets light into the interior of the eye. ![]() Let's review the structure and function of the parts of the vertebrate eye. ![]()
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