Other than the heart and lungs, what are four major organs through which the blood passes?
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Kidneys, liver, spleen, and pancreas?
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Right atrium through the tricuspid valve to the right ventricle through the pulmonic valve to the pulmonary trunk to the pulmonary arteries to the capillary beds of the lungs to the pulmonary veins to the left atrium of the heart through the bicuspid valve to the left ventricle through the aortic valve to the aorta to the systemic arteries to the capillary beds of the tissues to the systemic veins to the superior and inferior venae cavae entering the right atrium of the heart.
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the "major artery" would be the AORTA (main artery delivering blood to body)... the "major vein" would be the SUPERIOR & INFERIOR VENA CAVA (main veins bringing blood back from body)  [the heart to lung circulation is the pulmonary artery & vein]
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Air travels to the lungs through a series of air tubes and passages. It enters the body through the nostrils or the mouth, passing down the throat to the larynx, or voice box, and then to the trachea, or windpipe. In the chest cavity the trachea divides into two branches, called the right and left bronchi or bronchial tubes, that enter the lungs.\n\nIn the adult human, each lung is 25 to 30 cm (10 to 12 in) long and roughly conical. The left lung is divided into two sections, or lobes: the superior and the inferior. The right lung is somewhat larger than the left lung and is divided into three lobes: the superior, middle, and inferior. The two lungs are separated by a structure called the mediastinum, which contains the heart, trachea, esophagus, and blood vessels. Both right and left lungs are covered by an external membrane called the pleura. The outer layer of the pleura forms the lining of the chest cavity.\n\nThe branches of the bronchi eventually narrow down to tubes of less than 1.02 mm (less than 0.04 in) in diameter. These tubes, called bronchioles, divide into even narrower tubes, called alveolar ducts. Each alveolar duct ends in a grapelike cluster of thin-walled sacs, called alveoli (a single sac is called an alveolus). From 300 million to 400 million alveoli are contained in each lung. The air sacs of both lungs have a total surface area of about 93 sq m (about 1000 sq ft), nearly 50 times the total surface area of the skin.\n\nIn addition to the network of air tubes, the lungs also contain a vast network of blood vessels. Each alveolus is surrounded by many tiny capillaries, which receive blood from arteries and empty into veins. The arteries join to form the pulmonary arteries, and the veins join to form the pulmonary veins. These large blood vessels connect the lungs with the heart.\n\n© 1993-2003 Microsoft Corporation. All rights reserved.
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The heart pumps blood to all parts of the body. The heart is made of tissue and is supplied with oxygen-rich blood and nutrients. Although the chambers of the heart are full of blood, the heart tissue itself is fed from a network of blood vessels traveling on their surface. These are called the coronary arteries.\n\nThere are three major coronary arteries. They are:\nleft anterior descending \ncircumflex \nright coronary artery
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The basic functions of blood are: carry oxygen and nutrients to cells; remove waste from tissues; maintain body temperature by carrying heat to all parts; allow communication between organs (e.g. hormone and neurotransmitter transport)
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The vertebrate cardiovascular system includes a heart, which is a muscular pump that contracts to propel blood out to the body through arteries, and a series of blood vessels. The upper chamber of the heart, the atrium (pl. atria), is where the blood enters the heart. Passing through a valve, blood enters the lower chamber, the ventricle. Contraction of the ventricle forces blood from the heart through an artery. The heart muscle is composed of cardiac muscle cells.
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Oxygen bind to hemoglobin which is part of the red blood cells.  It is picked up in the lungs where there are little sacs that have a very thin lining of cells.  Therefore the air you breathe in will be able to reach the blood.  Then the hemoglobin will carry blood to the parts of the body.
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The circulation of blood in fish is simple. The heart only has two chambers, in contrast to our heart, which has four. This is because the fish heart only pumps blood in one direction. The blood enters the heart through a vein and exits through an artery on its way to the gills. In the gills, the blood picks up oxygen from the surrounding water and leaves the gills in arteries, which go to the body. The oxygen is used in the body and goes back to the heart. This is a very simple closed-circle circulatory system.
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the prefix pulmo- refers to lungs. so the pulmonary circulation involves blood circulation from the heart to the lungs and back.
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* Cardiovascular system: blood circulations with heart and blood vessels\n    * Digestive system: processing food with mouth, stomach and intestines\n    * Endocrine system: communicating within the body using hormones\n    * Immune system: defending against disease-causing agents\n    * Integumentary system: skin, hair and nails\n    * Lymphatic system: structures involved in the transfer of lymph between tissues and the bloodstream\n    * Muscular system: moving the body\n    * Nervous system: collecting, transferring and processing information with brain and nerves\n    * Reproductive system: the sex organs\n    * Respiratory system: the organs used for breathing, the lungs\n    * Skeletal system: structural support and protection through bones\n    * Urinary system: the kidneys and associated structures involved in the production and excretion of urine
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Heart, arteries, veins.
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see this gonna be a little long but u will know it only if u read it, k? \n there are 4 chambers in the human heart. the upper chambers are called atrium n the lower are called ventricles. there is a vertical partition called septum. the blood enters into the right atrium through two tube like veins called inferior n superior venacava. these venacavae carry De-oxygenated blood from the whole body.this blood which is in the atrium then goes to the right ventricle during the contraction of the atrium. at the same time blood enters the left atrium from a tube called pulmonary vein which comes from the lungs carrying oxygenated blood. when the atria contract ,this blood enters the left ventricle. when the ventricles contract the DE-oxygenated blood from the rt ventricle is pumped into pulmonary artery which goes to the lungs for oxygenation; and the oxygenated blood from the left ventricle is pumped throughout the body through the systemic aorta.
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Frogs have a three-chambered heart, consisting of two atria and a single ventricle. Blood leaving the ventricle passes into a forked aorta, where the blood has an equal opportunity to travel through a circuit of vessels leading to the lungs or a circuit leading to the other organs. Blood returning to the heart from the lungs passes into one atrium, while blood returning from the rest of the body passes into the other. Both atria empty into the single ventricle. While this makes sure that some blood always passes to the lungs and then back to the heart, the mixing of oxygenated and deoxygenated blood in the single ventricle means the organs are not getting blood saturated with oxygen. Still, for a cold-blooded creature like the frog, the system works well.
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Veins carry deoxygenated blood from the organs and tissues back to the heart.\nDeoxygenated blood from the body enters the right atrium through two great veins, the superior vena cava which drains the upper part of the body and the inferior vena cava that drains the lower part which drains the portal cyrculation too full with nutrients to nourish the body.
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Respiratory and circulatory.\n\nRespiratory brings oxygen into your body.  Circulatory pumps blood, which carries the oxygen, to the cells in the rest of your body.
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The Circulatory system?