blood vessel-a vessel in which blood circulates. vein, vena, venous blood vessel-a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary vein carry unaerated blood. venous blood system, venation - (zoology) the system of venous blood vessels in an animal. lymph gland, lymph node, node-the source of lymph and lymphocytes. vascular system-the vessels and tissue that carry or circulate fluids such as blood or lymph or sap through the body of an animal or plant. fetal circulation, foetal circulation-the system of blood vessels and structures through which blood moves in a fetus.
Squirrels are dangerous, not necessarily to humans but to their property. Squirrels will chew through and damage the structure of homes and personal property, including electrical wiring, which is a fire hazard.
Interesting Facts: 1  They do not really fly. 2  They may store up to 15,000 nuts in a season. 3  Flying Squirrels are the only nocturnal tree squirrel, and are the smallest of all squirrels. 4  They have been kept as pets since the Colonial era. 5  Northern Flying Squirrels make a low, soft chirp, and cluck when distressed. There has never been a report of flying squirrels having rabies. They can get typhus, but this is only rarely passed to humans. They can get lice, fleas, mites and parasites. Identification: Small (about 8-12 inches long), large bulging eyes, flattened tail, whitish underneath. Furry membrane between front and rear legs. Males and females look alike.