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Topic: Cardiovascular system


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  Circulatory system - Wikipedia, the free encyclopedia
The circulatory systems of all vertebrates, as well as of annelids (for example, earthworms) and cephalopods (squids and octopuses) are closed, meaning that the blood never leaves the system of blood vessels consisting of arteries, capillaries and veins..
The human cardiovascular system comprises the blood, the heart, and a dual-circuit system of blood vessels that serve as conduits between the heart, the lungs, and the peripheral tissues of the body.
The circulatory system of the fetus is different, as the fetus does not use its lungs yet and obtains oxygen and nutrients from the placenta through the umbilical cord.
en.wikipedia.org /wiki/Cardiovascular   (1788 words)

  
 Cardiovascular System Information
Cardiovascular Health is a new section, which will teach you how your heart and cardiovascular system work when healthy, and what happens when diseased.
The main role of the cardiovascular system in the body is to transport oxygen to all tissues in the body and for removing, from these same tissues, metabolic waste products.
The system itself consists of the blood, the medium for exchanging oxygen, nutrients and waste products throughout the body, the blood vessels, the pipes through which the blood flows and the heart, the pump which forces blood to flow through the blood vessels.
www.besthealth.com /besthealth/bodyguide/reftext/html/cardio_sys_fin.html   (1319 words)

  
 e-Cardiovascular.net: Information on the cardiovascular system; heart, blood vessels and normal function   (Site not responding. Last check: 2007-09-18)
The cardiovascular system consists of a muscular pump, the heart, in a double circuit of pipes that carry blood from the heart to the lungs and back in one circuit, the pulmonary circulation, and to the rest of the body and back to the heart, the systemic circulation.
The arterial system to the body begins with large arteries that progressively branch to smaller and smaller vessels to the level of capillaries which then join the smallest vessels of the venous system which progressively converge to form large veins that return blood to the heart.
Injury or failure of the cardiovascular system, especially the heart, is a critical problem in that peripheral tissues depend on the delivery of nutrients and the removal of wastes through the blood vascular system.
www.e-cardiovascular.net   (398 words)

  
 Cardiovascular System   (Site not responding. Last check: 2007-09-18)
Cardiovascular system in female figure standing in a Yoga pose.
Accurately depicts the primary cardiovascular (circulatory) system anatomy of the male.
The kidneys, glomeruli and cardiovascular system are highlighted.
www.indexedvisuals.com /html/Search/CardiovascularSystem.htm   (215 words)

  
 Introduction to Cardiovascular Pharmacology
The cardiovascular system consists of three anatomical components: the autonomic nervous system, the heart, and the vasculature.
The postganglionic neurotransmitter of the parasympathetic nervous system is acetylcholine.
The proper functioning of the cardiac conduction system, with the consequent coordination of contraction and valve opening and closing in each region of the heart, is critical for efficient pumping of blood.
lysine.pharm.utah.edu /netpharm/netpharm_00/notes/introcv.htm   (1929 words)

  
 cardiovascular system --  Encyclopædia Britannica
in humans, organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes.
Two circuits, the pulmonary and the systemic, consist of arterial, capillary, and venous components.
The function of the cardiovascular system is to maintain an adequate supply of oxygen to all tissues of the body.
www.britannica.com /eb/article-9106244   (992 words)

  
 Cardiovascular System / Introduction to the Cardiovascular System
The cardiovascular system is sometimes called the blood-vascular or simply the circulatory system.
As the name implies, blood contained in the circulatory system is pumped by the heart around a closed circle or circuit of vessels as it passes again and again through the various "circulations" of the body.
The vital role of the cardiovascular system in maintaining homeostasis depends on the continuous and controlled movement of blood through the thousands of miles of capillaries that permeate every tissue and reach every cell in the body.
training.seer.cancer.gov /module_anatomy/unit7_1_cardvasc_intro.html   (267 words)

  
 NUTRITION FOR THE CARDIOVASCULAR SYSTEM
The cardiovascular system has special nutritional requirements unlike that of the rest of the body.
The cardiovascular system is comprised of the heart, blood vessels (arteries, capillaries, veins), and blood.
Cardiovascular disease is the leading health priority of Americans and the leading cause of death.
www.angelfire.com /oh3/nutritionals   (599 words)

  
 Cardiovascular System
The term cardiovascular system is a shorthand way to describe the totality of components and processes that combine and interact to jointly serve our blood circulation needs.
Within the cardiovascular system, the normal actions of the cells and genes depend on the specific structures in which they are located and on the specific functions of these structures.
For example, a primary role of the large arteries is to serve as conduits to bring blood from the heart to the body's cells and tissues.
www.miamiheartresearch.org /LearningCenter/YourCardiovascularSystem/Cardiovascular.htm   (624 words)

  
 The Blood Circulation System
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.
Systemic pressure is sensed by receptors in the arteries and atria.
Two main routes for circulation are the pulmonary (to and from the lungs) and the systemic (to and from the body).
www.chelationtherapyonline.com /articles/p198.htm   (3609 words)

  
 The Cardiovascular System
To study the relationship between structure and function in the cardiovascular system.
Embryologically the heart, like the rest of the cardiovascular system, develops from a tubular channel.
Between the endocardium and myocardium is the subendocardial layer, where nerves and the impulse-conducting system (Purkinje fibers) are located in a bed of connective tissue.
ect.downstate.edu /courseware/histomanual/cardiovascular.html   (1687 words)

  
 Effect of ions on heart function (from cardiovascular system) --  Britannica Student Encyclopedia
It is a closed tubular system in which the blood is propelled by a muscular heart.
Cardiovascular diseases constitute one of the major human health problems of modern times.
The cardiovascular, or circulatory, system in humans is composed of the heart and the blood vessels—arteries, veins, and capillaries.
www.britannica.com /ebi/article-33565   (946 words)

  
 The Marvels of the Circulatory System - Jehovah's Witnesses Official Web Site
No human engineer could design such a system, yet that is what the Creator did when he formed the veins, arteries, and capillaries of the human body.
One is the cardiovascular system, which includes the heart, the blood, and all the blood vessels.
The powerhouse behind the cardiovascular system is, of course, the heart.
www.watchtower.org /library/g/2001/3/22/article_01.htm   (1582 words)

  
 PATTS - Cardiovascular System
A specialized component of the circulatory system is the lymphatic system, consisting of a moving fluid (lymph/interstitial fluid); vessels (lymphatics); lymph nodes, and organs (bone marrow, liver, spleen, thymus).
The lymphatic system functions 1) to absorb excess fluid, thus preventing tissues from swelling; 2) to defend the body against microorganisms and harmful foreign particles; and 3) to facilitate the absorption of fat (in the villi of the small intestine).
Lymph vessels connect to lymph nodes, lymph organs (bone marrow, liver, spleen, thymus), or to the cardiovascular system.
webschoolsolutions.com /patts/systems/heart.htm   (1635 words)

  
 Category:Cardiovascular system - Wikipedia, the free encyclopedia
The cardiovascular system incorporates the heart and blood vessels.
The endocrine and immune systems also use the blood circulation as conduits for hormones and immune cells, respectively.
For more information, see the article about Cardiovascular system.
en.wikipedia.org /wiki/Category:Cardiovascular_system   (87 words)

  
 cardiovascular system   (Site not responding. Last check: 2007-09-18)
Although systemic arterial blood is highly oxygenated, the pulmonary arteries carry deoxygenated blood.
You probably recall that the sympathetic division of the autonomic nervous system tends to activate the body in preparation for "fear, flight, or fight" reactions, so it makes sense for the sympathetic supply to speed the heart and increase blood flow to the brain, skeletal muscles, and other vital tissues ready for action.
This state of "rest and repose" induced by the parasympathetic system enables the body to rebuild energy reserves and carry out routine repairs, and the heart rate is slowed too.
www.nurseminerva.co.uk /cardio.html   (3121 words)

  
 [No title]   (Site not responding. Last check: 2007-09-18)
The design of the avian respiratory system is extraordinarily efficient, so that birds can extract sufficient oxygen for life even while undertaking strenuous exercise at altitudes of up to 7 or even 8 Km.
A major feature of the respiratory system of birds is pneumatisation of the long bones, the vertebral column and even the skull.
These extend into the long bones: in the 18th century John Hunter showed that birds could still breath with a blocked windpipe provided one of the long bones (he tried both the femur and the humerus) was connected to the outside air.
numbat.murdoch.edu.au /Anatomy/avian/avian3.html   (879 words)

  
 Cardiovascular System   (Site not responding. Last check: 2007-09-18)
The circulatory system consists of the heart and blood.
Blood is the transport medium of the circulatory system.
The respiratory system transports gases to and from the circulatory system.
www.student.loretto.org /anatomyphys/chp43.htm   (1594 words)

  
 Cardiovascular System
Cardiovascular System; Cardiovascular System / anatomy and histology; Cardiovascular System / pathology; Cardiovascular System / surgery
Covering the entire spectrum of cardiovascular disease, this book is edited by three Yale University professors of medicine, and is aimed at a general audience.
Its aim is to advance education in the field of cardiovascular and thoracic surgery and research in thoracic physiology, pathology and therapy.
omni.ac.uk /browse/mesh/D002319.html   (1811 words)

  
 Effects of Exercise on the Cardiovascular System   (Site not responding. Last check: 2007-09-18)
The circulatory system responds to an increased need for blood by adjusting the width of the blood vessels, primarily the arterioles and venules.
From the formula given there, we see that blood flow depends very sensitively on the width of the blood vessels, so that changing the radius slightly has a large impact on the flow of blood.
The circulatory system exploits this property rather nicely, by constricting blood flow the organs that need less oxygen during exercise and widening the arterioles to the organs which need more.
math.arizona.edu /~maw1999/blood/exercise.html   (298 words)

  
 Amazon.co.uk: Books: The Cardiovascular System at a Glance (At a Glance S.)   (Site not responding. Last check: 2007-09-18)
The Cardiovascular System at a Glance is a concise and accessible systems-based textbook.
The text progresses from basic science to clinical application: a general introduction to the cardiovascular system is followed by anatomy and histology; blood and body fluids; biochemistry and excitation-contraction coupling; form and function; integration and regulation; and pathology and therapeutics.
The second edition of The Cardiovascular System at a Glance is an ideal resource for medical students, whilst students of other health professions and specialist cardiology nurses will also find it invaluable.
www.amazon.co.uk /exec/obidos/ASIN/1405113278   (813 words)

  
 Avian Circulatory System
The systemic arch is also called the aorta and delivers blood to all areas of the body except the lungs.
Different components of the immune system (bursa and spleen) may have evolved to mitigate the negative impact of parasites on brain function.
The avian cardiovascular system is able to quickly respond to changes in levels of activity (e.g., resting vs. flying) via changes in heart rate, cardiac output, and blood flow (by vasocontriction and vasodilation of vessels).
people.eku.edu /ritchisong/birdcirculatory.html   (3453 words)

  
 circulatory system on Encyclopedia.com
The organs of circulatory system consist of vessels that carry the blood and a muscular pump, the heart, that drives the blood.
The human heart is a four-chambered organ with a dividing wall, or septum, that separates it into a right heart for pumping blood from the returning veins into the lungs and a left heart for pumping blood from the lungs to the body via the aorta.
An auxiliary system, the lymphatic system, is composed of vessels that collect lymph from body tissues.
www.encyclopedia.com /html/c1/circulat.asp   (626 words)

  
 Laboratory Nine: Cardiovascular System
Discuss the elements of the cardiovascular system and their function.
The cardiovascular system delivers important substances to the cells, such as nutrients, antibodies, and hormones.
This unit examines the basic structure of the cardiovascular system.
medinfo.ufl.edu /year1/histo/review/lab09.html   (1539 words)

  
 Your Gross and Cool Body: Circulatory System
It's a big name for one of the most important systems in the body.
Made up of the heart, blood and blood vessels, the circulatory system is your body's delivery system.
A "heartbeat" is really the sound of the valves in the heart closing as they push blood through its chambers.
yucky.kids.discovery.com /flash/body/pg000131.html   (422 words)

  
 THE CIRCULATORY & LYMPHATIC SYSTEMS AND BLOOD   (Site not responding. Last check: 2007-09-18)
The Circulatory System is known as a CLOSED SYSTEM because the blood is contained within either the Heart or Blood Vessels at all times.
The Lymphatic system has no pump like the heart, lymph must be moved through vessels by the squeezing of skeletal muscles.
The Main Function of the Circulatory System is to Transport Material in a FLUID Medium throughout the body.
www.sirinet.net /~jgjohnso/circulation.html   (3807 words)

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