Diagram showing the course of fibers in the dorsal column. The fasciculus gracilis exists at all levels of the spinal cord and contains long ascending fibers from the lower limbs (shown in red). The fasciculus cuneatus exists in thoracic (T) segments above T6 (T1-T6) and cervical (C) segments (C1-C8) and contains long ascending fibers from the upper limbs (shown in blue). The axons of second-order neurons (neuron II) in the nucleus gracilis and cuneatus travel as internal arcuate fibers and…
The human eye viewed from inside, showing the iris, the ciliary body, and the edge of the pupil.
Giantmicrobes.com has a pretty decent set of categories for their products - I like the organization. Also, they have started producing specialized human cells and small multicellular pests. Blog with educational suggestions: http://www.stemmom.org/2012/04/giant-menacing-microbes.html
The Rise of Chronic Conditions Unlike many ailments, chronic illnesses can be controlled but not cured. Check out this #infographic from the University of Arizona's College of Nursing for information on the prevalence of just three of many chronic illnesses.