Cervical spinal stenosis is the narrowing of the spinal canal in the neck. The spinal canal is the open area in the bones (vertebrae) that make up the spinal column.The spinal cord is a collection of nerves that runs through the spinal canal from the base of the brain to the lower back. Stiffness, pain, numbness, or weakness in the neck, shoulders, arms, hands, or legs. 2  Balance and coordination problems, such as shuffling or tripping while walking. 3  Cervical spinal stenosis can be crippling if the spinal cord is damaged.
Its singular form is called stoma, and it means 'mouth'. Stomata function is to regulate the process of photosynthesis, transpiration, respiration, etc. In this article we are going to discuss this structure and function in plants, which is an important part of plant biology. Positioning and Structure.
Structure. A stoma is the opening on a plant leaf, but there are specialized cells surrounding each stoma that control how open or closed it is. These specialized cells are called guard cells, and they are triggered by a number of factors, such as sunlight, humidity, temperature, and internal plant chemistry.uring photosynthesis, carbon dioxide is taken in from the atmosphere through the stomata and oxygen is released as a waste product. Both photosynthesis and the gas exchange that powers it are essential to the plant's survival.