sense organ. In animals, an organ or part that is sensitive to a stimulus, as of sound, touch, or light. Examples of sense organs include the eye, ear, and nose, as well as the taste buds on the tongue.ar-the sense organ for hearing and equilibrium. organ of hearing-the part of the ear that is responsible for sensations of sound. inner ear, internal ear, labyrinth-a complex system of interconnecting cavities; concerned with hearing and equilibrium.
Arterial Ulcers Arterial ulcers, also referred to as lower extremity ulcers, typically occur in patients who are suffering from artery disease. This type of skin ulcer is typically located on the feet, toes and toenails, where the poorly functioning arteries have trouble circulating blood properly. The base of an arterial ulcer has a brown, yellow, black or gray color, while the surrounding skin often looks red and swollen. Arterial skin ulcers are usually painful, and the pain can be far worse at night.
Arteries: Arteries are blood vessels that supply blood to the tissues of body. They carry the blood away from heart and because the blood inside them is oxygenated, they appear red in color. Large arteries of elastic type, e.g. aorta and its main branches (brachiocephalic, common carotid, subclavian and common iliac) and the pulmonary arteries. 2  Medium and small arteries of muscular type, e.g. temporal, occipital, radial, popliteal, etc. 3  Smallest arteries of muscular type are called arterioles.