Ground substance is the background material within which all other connective tissue elements are embedded. In ordinary connective tissue, the ground substance consists mainly of water whose major role is to provide a route for communication and transport (by diffusion) between tissues.
Definitions for tiredness. Here are all the possible meanings and translations of the word tiredness. Princeton's WordNet(0.00 / 0 votes)Rate this definition: fatigue, weariness, tiredness(noun) temporary loss of strength and energy resulting from hard physical or mental work. he was hospitalized for extreme fatigue; growing fatigue was apparent from the decline in the execution of their athletic skills; weariness overcame her after twelve hours and she fell asleep.
Feeling Dizzy and Tired. Dizziness as a disorder is defined by a dimmed vision, confusion, light-headedness, or a brief loss of consciousness. Fatigue is mental or physical exhaustion that may be triggered by overwork, medication, stress, physical illness, or disease. The symptoms could be related toalcoholism,substance abuse, or strict dieting. For people experiencing dizziness and tired, the causes are many, ranging from light to severe.