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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: Anat Rec (Hoboken). 2015 Nov 28;299(1):25–41. doi: 10.1002/ar.23283

Figure 12.

Figure 12

Late coronary development, as seen in 26–30 week fetuses. A, a major development is the deposition of elastic fibers in the major coronary arteries (CA). B, a second characteristic is the accumulation of collagen to the adventitia (Adv) of the major coronary arteries; thus the tunica adventitial becomes thicker than the media. Ao, aorta; RCA & LCA, right & left coronary arteries; Epi, epicardium; Adv, adventitia. A stained for elastin, B stained with Masson trichrome. Magnification bar = 100 μm.