[Solved] This low power photomicrograph of the lung shows a thromboembolism within a pulmonary artery.What is the most likely source for this thrombus? A)Deep leg veins B)Left atrium C)Left ventricle D)Likely formed in situ on top of an atherosclerotic plaque E)Right atrium F)Right ventricle G)Vena cava Stratum Corneum: The outermost layer of the epidermis, comprised of dead cells that provide a barrier against the external environment. Eccrine Sweat Glands: Sweat glands that produce a water-based secretion, helping to cool the body through evaporation of sweat. Negative Feedback Loop: A regulatory mechanism in which a 'stimulus' causes an 'output' action that in turn diminishes or stops the original stimulus. Arrector Pili Muscles: Small muscles attached to hair follicles that cause hair to stand upright (as in "goosebumps") in response to cold or fear.