cells and tissues. Waste substances flow from the tissues and cells into the blood for disposal. The capillaries join and enlarge to create tubes that eventually become veins‚ which take blood back to the heart. Vessels carrying oxygenated blood (usually arteries) are shown in red and those carrying deoxygenated blood (usually veins) are blue. The cardiac muscle of the heart wall depends on a constant flow of blood supply by the coronary arteries. Coronary arteries are blood vessels that arise from
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Veins are blood vessels that return blood from the outer parts of the body back to the heart. Veins have different sizes that depends on their location and function. The veins that are deeper and closer to the center of the body are called deep veins. Varicose veins are veins that have become bulging‚ widened and twisted. They usually look blue or dark purple. Some other symptons of varicose vains include: aching‚ heavy and uncomfortable legs‚ swollen feet and ankles‚ muscle cramping and swelling
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The cardiovascular system is a closed organ system that is found within humans and other vertebrates. The heart consists of the right and left ventricle‚ right and left atrium‚ aorta‚ capillaries‚ pulmonary arteries and veins and the anterior and posterior vena cava. All of the following structures maintain the heart’s beating cycle and the circulation of blood throughout the body. Three main types of blood vessels: Arteries - Thick-walled tubes in which blood is brought from the heart to various
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lymphatic system‚ the muscular –skeletal system and lastly the endocrine system. Each of these systems has their own functions and purpose Cardiovascular System- The cardiovascular system is made up of the heart‚ blood vessels‚ arteries‚ capillaries and veins. The cardiovascular system makes up a network which helps to deliver blood to all the tissues in our body. Each heartbeat pumps blood around our body‚ carrying necessary nutrients needed for our body to be absorbed and oxygen to the cells within our
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Smooth muscle- are involuntary muscles found in the walls of hollow organs like the stomach‚ intestines or bladder. Smooth Muscles have many functions in the body‚ but one of the functions of smooth muscles in the bladder contracts to push urine out of the body. Skeletal muscle- Skeletal Muscles are muscles attached to the skeleton. The skeletal muscles main function is to contract to support the skeleton in movement. Skeletal muscles are voluntary because we have complete control of the movements
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to give medicine or nutrition through a person’s veins. The tip of the central line ends in a large vein (vena cava) just above the person’s heart. Medicine given through the central line is quickly mixed with blood because the blood flow within this large vein is so great. This dilutes the medicine so it is swiftly delivered throughout the body. A central line may be placed because: You need medicine that would be irritating to the small veins in your hands or arms. You need long-term IV
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08/12/13 1. MEDICAL TERMINOLOGY Aneurysm (AN-ū-rizm) A thin‚ weakened section of the wall of an artery or a vein that bulges outward‚ forming a balloonlike sac. Common causes are atherosclerosis‚ syphilis‚ congenital blood vessel defects‚ and trauma. If untreated‚ the aneurysm enlarges and the blood vessel wall becomes so thin that it bursts. The result is massive hemorrhage with shock‚ severe pain‚ stroke‚ or death. Treatment may involve surgery in which the weakened area of the blood
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of circulation through the capillaries is called microcirculation. Image 1 bellow shows the components of the capillary bed. http://www.bbc.co.uk/schools/gcsebitesize/science/triple_ocr_21c/further_biology/circulation/revision/4/ 1 Arteries‚ Veins and Capillaries When the oxygenated blood travels via the arterioles into the capillaries‚ which are only 1 cell thick and are permeable‚ certain gasses and substances can flow/diffuse from the blood to the
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The first was said to be the continued use of leeches. The second was called arteriotomy‚ which is a process where the arteries in the temples would be ruptured and bled. The third was phlebotomy‚ commonly known back then as “breathing a vein”‚ where a large vein would be cut‚ to draw blood. The last was scarification which is said to be a particularly stomach-tossing method that involved one of a varied set of tools such as spring-loaded lancets and a round‚ mutli-bladed‚ and spring-loaded device
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through a wire‚ called a lead. Sometimes just one lead is needed. Other times‚ there will be two leads. There are two types of pacemakers: • Transvenous pacemaker. This type is placed under the skin or muscle of your chest. The lead goes through a vein in the chest area to reach the inside of the heart. • Epicardial pacemaker. This type is placed under the skin or muscle of your chest or belly. The lead goes through your chest to the outside of the
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