Top definition. Musk. Though technically the name for the secretion of the male musk deer, musk is most often used as the name for the scent of arousal in both men and women, as actual musk is used in perfumes and colognes. Generally causes arousal for both genders, as it is a secondary sex characteristic.
These photoreceptors are called the rods and cones. Rods are called rods because under the microscope, they are shaped like, of all things, a rod. Finally, those pesky scientists named a structure for what it actually looks like as opposed to someone's unpronounceable last name!
Only cones are found in the fovea centralis, whereas mostly rods are found in the periphery of the retina. Cones are the photoreceptors that operate best in bright light and allow for color vision. Dissection of the Cow (Sheep) Eye. 14. What modification of the choroid that is not present in humans is found in the cow eye? Tapetum lucidum What is its function? To reflect light that enters the eye, thus increasing light stimulation of the retina under dim light conditions 15. What does the retina look like?