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. and Veins . Learning Outcomes. Arteries have an outer layer of connective tissue containing elastic fibres and a middle layer containing smooth muscle with more elastic fibres. The elastic walls of the arteries stretch and recoil to accommodate the surge of blood after each contraction of the heart. The smooth muscle can contract or relax causing vasoconstriction or vasodilation to control blood flow. Nature of Science. : theories are regarded as uncertain:. William Harvey overturned theories developed by the ancient Greek philosopher Galen on movement of blood in the body. . Galen (130- 200) – Greek physician & philosopher. Tissues. Groups of cells that have specialized structural and functional roles . Four major types. Epithelial. Connective. Muscle. Nervous. Epithelial. Covers organs. Forms the inner lining of body cavities. venules. , and veins differ in size, structure, and function. Kelsee. , Aimee . How it works. Blood leaves heart through pulmonary trunk and aorta. Vessels branch forming major arteries that carry blood to body organs. Brain. Heart. Muscle. Control of tissue flow. Intrinsic Control. Extrinsic control. Long term control. Tissue. Height~ perfusion pressure. Figure 20-14 Autoregulation of blood flow.. Downloaded from: StudentConsult (on 25 February 2010 10:44 PM). Anatomy Test Review 1 Which component of blood is directly responsible for transporting oxygen to body cells? A. plasma B. platelets C. red blood cells D. white blood cells 2 A boy jumps into a cold swimming pool and his body temperature goes down. His muscles, blood vessels, and nervous system work together to restore his body temperature. Which term best describes this process? venules. , and veins differ in size, structure, and function. Kelsee. , Aimee . How it works. Blood leaves heart through pulmonary trunk and aorta. Vessels branch forming major arteries that carry blood to body organs. _Cardio vascular system. _Lymphatic vascular system. Cardio vascular system is concerned with the transport of blood and lymph through the body. . The main function of the blood are to transport 02, nutrients and hormones to the tissues and to collect the waste products( carbon dioxide and waste metabolites) for removal from the body via excretory system. . Rhys Thatcher. Reader in Exercise Physiology. The Heart. Is the pump which propels blood around the body via the blood vessels. Can be considered a muscle sac. It is situated centrally in the thorax, slightly to the left. Zahiri. . Cardiovascular System. Consists of:. Blood vessels. Lymphatic vessels. Heart. . Blood vessels . Arteries:. transport blood away from heart. Veins:. drain . microvascular. beds, . returnining. G. astrointestinal tract.. Structure of the gastrointestinal tract.. The wall of the GIT is divided into 4 layers namely;. Mucosa.. Submucosa.. Muscularis. externa.. Serosa.. Mucosa . Innermost layer with specialized epithelial cells which are supported by underlying connective tissues known as the lamina . Dr. . Hossam. El-. deen. Salem. Heart. I. . Endocardium. Endothelium . of simple squamous . epithelium. Subendothelial. . layer of loose connective . tissue. Structure of the heart. II. . . Myocardium . Requirements of Organisms. :. Life depends on the availability of the following:. . a. . Water. (required for metabolic reactions, for transport of substances, for temperature regulation). b. . Nursing Department . Lec:3. Assistant Instructor:. MSc. Kareem J. . Dhaidan. Cardiovascular Combining Forms. angi/o . . vessel. aort/o . . aorta. arteri/o . . artery. ather/o .