Engines that do not have a water cooling system can not use a heater core; one alternative is to guide air around the (very hot) engine exhaust manifold and then into the vehicle's interior. Temperature control is achieved by mixing with unheated outside air.
OBJECTIVE: The thickness of the prevertebral soft tissue (PVST) is instrumental in helping detect cervical spine injuries in the pediatric population.ormal pediatric prevertebral soft-tissue thickness on MDCT. Vermess D(1), Rojas CA, Shaheen F, Roy P, Martinez CR. Author information: (1)Department of Radiology, University of South Florida College of Medicine, 12901 Bruce B. Downs Blvd, Box 17, Tampa, FL 33612, USA.
Exchange of materials take place between the tissue cells and theblood in the true capillaries. The precapillary sphincter is a cuff of smooth muscle fibers thatsurround the root of each true capillary, acting as a valve to regulate the flow of blood into the truecapillaries.xchange of materials take place between the tissue cells and theblood in the true capillaries. The precapillary sphincter is a cuff of smooth muscle fibers thatsurround the root of each true capillary, acting as a valve to regulate the flow of blood into the truecapillaries.