(206) Waste pipe and special waste means any pipe which receives the discharge of any fixture (except water closets or similar fixtures) and discharges to the house drain, soil or waste stacks. When such pipe does not connect directly with a house drain, waste or soil stack, it is termed a special waste.
As with the other ventricles of the brain, it is filled with cerebrospinal fluid, which helps to protect the brain from injury and transport nutrients and waste. The third ventricle is a narrow cavity that is located between the two halves of the brain. The third ventricle sends messages to and receives messages from the lateral ventricles, which are located in front of the third ventricle, and the aqueduct of the midbrain, which is located directly behind the third ventricle. The hypothalamus and thalamus are located on the sides of the third ventricle. Abnormalities of the third ventricle are associated with various conditions including hydrocephalus, meningitis, and ventriculitis. Hydrocephalus is an excessive buildup of fluid on the brain.
The atrioventricular valves are located between the atria and the ventricles. They close during the start of ventricular contraction (systole), producing the first heart sound. There are two AV valves: Tricuspid valve â located between the right atrium and the right ventricle (right atrioventricular orifice).