eye

• the 3 tunics of the eye are the fibrous, vascular, and sensory tunics
• the fibrous tunic contains the sclera and cornea. also is the outermost tunic of the eye. composed of avascular conn tissue
• the vascular tunic contains the choroid, ciliary body, ciliary process, iris, and pupil. also is the middle layer
• the sensory contains tunic rods and cones. also is the innermost layer
• aqueous humor is a watery solution that fills the anterior chamber
• vitreous humor is a gelatinous substance that fills the posterior chamber
• rods are sensitive for dim/low level light vision
• cones are good for acuity in vision
• the optic disc is the point where the optic nerve leaves the eye, the “blind spot”
• the reflex arc goes, receptor -> sensory neuron -> integration center -> motor neuron -> effector
• tactile corpuscles are located in the dermal papillae and are sensitive to light touch
• lamellar corpuscles are found in the deep dermis and are sensitive to deep pressure
• bulbous corpuscles are found deep in the dermis/joints and are sensitive to deep pressure and stretch
• muscle spindles are found in the skeletal muscle fibers and detect stretch and tension
• tendon organ are found in the tendon and are sensitive to tendon stretch
• joint kinesthetic receptors are found in the joint capsule and ligaments. are sensitive to joint sense and pain