Sclera pass. The thickness of the sclera varies from 1mm at the posterior pole to 0.3 mm just behind the rectus muscle insertions. The sclera's blood vessels are mainly on the surface. Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red. In many vertebrates, the sclera is reinforced with plates of cartilage or bone, together forming a circular structure called the sclerotic ring. In primitive fish, this ring consists of four plates, but the number is lower in many living ray-finned fishes, and much higher
Catholic theology of the body the consequence according to Didymus. He compares this with wine being mixed with water. The body has some functions for the soul. The body informs the soul of the sensual world around them. Didymus called the body the outer person and the soul the inner person. The outer person is perishable. The inner person is eternal. The heart of the person leads the person as a whole towards good or bad deeds. Didymus maintains freedom of will, which is however weakened through the fall of Adam of Eve. A person who uses his free will to be a spiritual person,