cardiovascular system anatomy

Our mission is to provide objective, science-based advice to help you make more informed choices. These sphincters regulate blood flow into the capillaries. Veins rely on gravity, inertia, and the force of skeletal muscle contractions to help push blood back to the heart. The cardiovascular system includes the heart and blood vessels and performs the function of pumping and carrying blood to the rest of the body. The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis. Platelets do not contain a nucleus and only survive in the body for up to a week before macrophages capture and digest them. Around 90% of plasma is made of water, although the exact percentage varies depending upon the hydration levels of the individual. Homework. As skeletal muscles in the body contract, they squeeze nearby veins and push blood through valves closer to the heart. It then moves into successively smaller and smaller arteries and then into arterioles, which feed the... Veins. The cardiovascular system consists of the heart, which is an anatomical pump, with its intricate conduits (arteries, veins, and capillaries) that traverse the whole human body carrying blood. Each heartbeat results in the simultaneous pumping of both sides of the heart, making the heart a very efficient pump. By Thomas Burnell and Bethany Turner. All blood vessels contain a hollow area called the lumen through which blood is able to flow. This quiz is incomplete! Quiz Chapter 11 Cardiovascular System. It also contains hormones and cells that fight infection. The atrioventricular (mitral and tricuspid) and semilunar (aortic and pulmonic) valves keep blood flowing in one direction through the heart, and valves in large veins keep blood flowing back toward the heart. The heart is a pump comprised of many structures. Choose from 500 different sets of cardiovascular system anatomy flashcards on Quizlet. After studying this chapter, you will be able to: Identify and describe the interior and exterior parts of the human heart; Science Made with Tour Creator. Test. Print; Share; Edit; Delete; Host a game. They face much lower blood pressures than arteries due to their greater number, decreased blood volume, and distance from the direct pressure of the heart. All Rights Reserved. The regulation of blood flow also affects blood pressure, as smaller arteries give blood less area to flow through and therefore increases the pressure of the blood on arterial walls. The heart is suspended in its own membranous sac, the pericardium. The heart is a muscular pumping organ located medial to the lungs along the body’s midline in the thoracic region. The shape of erythrocytes is biconcave—disks with a concave curve on both sides of the disk so that the center of an erythrocyte is its thinnest part. So, these are the two key parts: the heart, which pumps blood, and the blood vessels, which carry blood to the body and return it back to the heart again. Tissues are in direct contact with the blood. A higher volume of blood in the body raises blood pressure by increasing the amount of blood pumped by each heartbeat. Capillaries connect to arterioles on one end and venules on the other. The heart has its own set of blood vessels that provide the myocardium with the oxygen and nutrients necessary to pump blood throughout the body. Next Lesson - The Cardiac Cycle. Anatomy and Physiology- Cardiovascular System DRAFT. When the muscle relaxes, the valve traps the blood until another contraction pushes the blood closer to the heart. Share: Share. The sympathetic (fight or flight) division of the autonomic nervous system causes vasoconstriction, which leads to increases in blood pressure and decreases in blood flow in the constricted region. One chamber on the left receives oxygen-rich blood from … Most capillaries are thinner than a hair. This network allows a non-stop courier system (the blood) to deliver and expel nutrients, gases, waste products and messages throughout the body. Responsible for transporting oxygen, nutrients, hormones, and cellular waste products throughout the body, the cardiovascular system is powered by the body’s hardest-working organ — the heart, which is only about the size of a closed fist. The proteins within plasma include antibodies and albumins. The heart is a four-chambered “double pump,” where each side (left and right) operates as a separate pump. 214 likes. The pulmonary trunk and arteries of the pulmonary circulation loop provide an exception to this rule — these arteries carry deoxygenated blood from the heart to the lungs to be oxygenated. Neutrophils contain digestive enzymes that neutralize bacteria that invade the body. To facilitate the movement of blood, some veins contain many one-way valves that prevent blood from flowing away from the heart. (adsbygoogle = window.adsbygoogle || []).push({}); The cardiovascular system has three major functions: transportation of materials, protection from pathogens, and regulation of the body’s homeostasis. The heart is the system’s pump and the blood vessels are like the delivery routes. Anatomy and Physiology of the Cardiovascular System So we have our lungs here. Share. Spell. The cardiovascular system consists of the heart, blood vessels, and the approximately 5 liters of blood that the blood vessels transport. The circulatory system is also called the cardiovascular system, where “cardi” refers to the heart, and “vascular” refers to the blood vessels. Module 3: The Cardiovascular System: The Heart. The circulatory (cardiovascular) system is made up of the heart, blood vessels and the blood. But what does the circulatory system do? Albumins help maintain the body’s osmotic balance by providing an isotonic solution for the cells of the body. An image shows a three-part illustration of the cardiovascular system. In the diagram, the vessels that carry oxygen-rich blood are colored red, and the vessels that carry oxygen-poor blood are colored blue. Arterioles are narrower arteries that branch off from the ends of arteries and carry blood to capillaries. Blood carries oxygen and nutrients to all the living cells in the body. Continue Scrolling To Read More Below... Join our Newsletter and receive our free ebook: Guide to Mastering the Study of Anatomy. Cardiovascular System Anatomy Ch 13. So here-- I copied this from Wikipedia, this diagram of the human circulatory system-- and here in the back you can see the lungs. Platelets form in the red bone marrow from large megakaryocyte cells that periodically rupture and release thousands of pieces of membrane that become the platelets. The coronary sinus is a vein on the posterior side of the heart that returns deoxygenated blood from the myocardium to the vena cava. Arterioles further branch into capillaries, the true deliverers of oxygen and nutrients to your cells. Plus there are links to lots of other great anatomy and physiology quizzes and other resources; all free! The average adult has between 5 and 6 liters of blood or blood volume. Read Post The subclavian artery runs into the axillary region where it becomes known as the axillary artery. Power point the cardiovascular system - anatomy and physiology Stephen Collins. Search for: Introduction to the Cardiovascular System: The Heart. The right and left atria and ventricles are highlighted. Flashcards. Atria: the two upper chambers; Ventricles: the two lower chambers; Valves: like doors to the chambers; It all comes together in the cardiac cycle. Anatomy and Physiology- Cardiovascular System DRAFT. The cardiovascular system comprises the heart, veins, arteries, and capillary beds. This process of blood flow within your body is called circulation. The Human Anatomy and Physiology course is designed to introduce students pursuing careers in the allied health field to the anatomy and physiology of the human body. Erythrocytes transport oxygen in the blood through the red pigment hemoglobin. Venules are similar to arterioles as they are small vessels that connect capillaries, but unlike arterioles, venules connect to veins instead of arteries. The cardiovascular system consists of the heart, blood vessels, and the approximately 5 liters of blood that the blood vessels transport. Vasoconstriction decreases the diameter of an artery by contracting the smooth muscle in the arterial wall. The heart is located in the mediastinum, the cavity between the lungs. Tweet. Let me do it in a nice dark color. Played 190 times. And what we learned in the last few videos is that we have our little alveoli and our lungs. The largest arteries of the body contain a high percentage of elastic tissue that allows them to stretch and accommodate the pressure of the heart. BTEC SPORT Anatomy and Physiology – Cardiovascular System Cardiovascular system Structure of the heart The heart is a muscle that acts as a pump. Also known as thrombocytes, platelets are small cell fragments responsible for the clotting of blood and the formation of scabs. Return counterparts of arteries movement of blood and the force of skeletal muscle contractions help... 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