Macula lutea

Macula lutea
An oval area in the retina, 3 to 5 mm in diameter, usually located temporal to the posterior pole of the eye and slightly below the level of the optic disk. It is characterised by the presence of a yellow pigment diffusely permeating the inner layers, contains the fovea centralis in its centre, and provides the best phototopic visual acuity. It is devoid of retinal blood vessels, except in its periphery, and receives nourishment from the choriocapillaris of the choroid.

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Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..

Roots

This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

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kinesin motor proteins transporting molecules across microtubules

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Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

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Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Selective Breeding

Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..