In histological slides, the clearly visible collagen bundles of the stroma are stained pink. The stroma, or core of the cornea, is a connective tissue made from parallel layers of collagen fibers that are produced by resident fibroblasts. In histological slides stained with H/E, the Bowman’s membrane is a solid pink layer directly under the epithelium. The innermost layer of the epithelium is columnar and lies on the Bowman’s membrane. On its external, convex surface, the cornea is covered by stratified squamous epithelium.
the fibrous tunic that comprises the sclera and cornea.The three layers, or tunics, of the eye are, counting from outside: The eye is a hollow, slightly elongated sphere formed by a three-layer wall. The eye is the special sensory organ that gives rise to vision. The human body has five specialized senses, including vision, hearing, balance, taste, and olfaction, and each requires a special sensory organ to be perceived.
While it is possible to literally feel the thumping bass at a concert, to truly appreciate the intricacies of sound – – the pitch, melody, timbre, and texture – – you need a specialized sense called hearing.
Vascular tunic free#
The somatic or general senses, including touch, temperature perception, pain, and proprioception (the awareness of one’s position and movement in space), use the free nerve endings in the skin, muscles, and membranes of the body to detect change and communicate that information to the CNS. The human body experiences its environment by reacting to stimuli that reach the brain via the nervous system.