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
101 Things Removed from the Human Body from their body survived. This program also aired in the USA on the Discovery network's "The Learning Channel" in October 2007. The program contains stories, including a man having a uterus and a man with a teratoma, a type of large tumor. The large jaw tumor segment featured the work Mercy Ships, who have operated floating hospital ships in impoverished areas around the world. 101 Things Removed from the Human Body 101 Things Removed from the Human Body and 101 More Things Removed from the Human Body is a British "shockumentary" series directed by Eric Schotz, which is narrated by