functions of human circulatory system?
444383
Circulatory system is primarily a transport and immune system.\n\nRed Blood Cells: Carbon Dioxide, Oxygen\nPlatelets: Emergency construction system.\nWhite Blood Cells: Immune system\nAntibodies: immune System\nSugars: Energy\nSalts: For cellular activity\nWater: For general functioning of life:\nHormones: Communication System\nDrugs: Communication System
78046
the one of brain's function in human physiology is that on the certain segment of brain controls heart rate. That means brain can order the heart to keep on pump in order to stay alive. \n\nWith each beat, the heart continuously communicates with the brain and body via the nervous system, hormonal system, bioelectromagnetic interactions, and other pathways.
1175801
http://en.wikipedia.org/wiki/Circulatory_system
648423
Blood supplies oxygen to all the parts of the body, thus enabling all the organs and systems to continue to function. Without blood and the movement of it through your body, your body would shut down due to oxygen deprivation. The respiratory system provides the oxygen via breathing and then sends it everywhere via the cardio(heart) vascular(veins and arteries) system. Blood supplies the nutrients we eat via the digestive systems and removes all the wastes. The human body is an amazing invention if you really think about it and blood is the biggest part of the body and even counts as a body in homicide cases where the actual body can't be found. Good luck in your classes.
635319
According to the site below:\n\nThe time it takes blood to circulate in the human vascular system varies with age, body size and condition, and whether the person is resting or engaged in vigorous physical and/or emotional activity. Nevertheless, on average the blood fully circulates in the human body some seven to eight times per minute.
414945
Its overall function is to collect information about the external conditions in relation to the body's internal state, to analyze this information, and to initiate appropriate responses to satisfy certain needs (Maintain Homeostasis). The most powerful of these needs is survival.
935401
Heart, arteries, veins.
546613
The heart is what pumps blood and is the centerpiece of the circulatory system. Without it the blood could not carry the nutrients the body needs. The lungs take in oxygen to help feed the bloodstream. Basically both organs do the same job, just in different ways and for the same end. Keeping YOUR blood infused with the nutrients the body requires to sustain itself. Hope this helps.
667354
The Cardiovascular System\n\n\n The cardiovascular system and the lymphatic system form what is collectively called the circulatory system. Together, these systems transport oxygen, nutrients, cell wastes, hormones, and many other substances to and from all cells in the body. The trillions of cells in the human body take up nutrients and excrete wastes every minute of every day. Although the pace of this exchange may increase with activity or slow with rest, it happens continuously. If it stops, so does life. Of the two systems, the cardiovascular system is the primary transport operator; the lymphatic system aids it in its function.\n\n\nDesign: Parts of the Cardiovascular System\n\nCardiovascular comes from the Greek word cardia, meaning "heart," and the Latin vasculum, meaning "small vessel." The basic components of the cardiovascular system are the heart, the blood vessels, and the blood. The system can be compared to a large muscular pump (the heart) that sends a fluid (blood) through a series of large and small tubes (blood vessels). As blood circulates through the increasingly intricate system of vessels, it picks up oxygen from the lungs, nutrients from the small intestine, and .....
1002860
a closed circulatory system is the type humans have.the blood flows through the blood vessels like arteries,veins and capillaries.in an open system,the blood vessels are either completely absent or not completely closed.
31165
* 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
348835
Humans have a closed circulatory system.  It is when the blood is contain in the veins and arteries.  Where the arteries take blood to the body and the veins take it directly back.  In an open system the heart pumps blood out into an open area where the blood just flows over the different body parts and then comes back to the heart on its own.  An open circulatory system is extremely inefficient and a lower form of evolution.
93541
wouldn't teh functions of the systems be the same for every organisms.  for example the respiratory system is for breathing in both cows and humans and probably for the toad as well.  the circulatory system is for circulating blood in every organsim.  the excretory system extrects toxins and metabolic wastes and the nervous system allows for cordiation of muscles and autonomic behaviors as well as cognitive thinking.  \n\nhowever the real functions of all these organs is SURVIVAL.  SURVIVAL is the driving force of life and you are kidding yourself if you think otherwise.
596955
The circulatory system absorbs the stuff you eat once it's broken down.  The lymphatic system helps protect you from bad stuff you've eaten.
1068530
Wow, I don't know if they'd let me type 1000 pages on the subject to cover your question even close to adequately, but I'll give the Reader's Digest version a go...\n\nThe circulatory system is a liquid highway your body uses to transport oxygen and nutrients everywhere they need to go and waste products away from those tissues to be disposed.  The heart is a just a positive displacement pump that keeps your blood flowing through the arteries and veins.  Lungs serve as an interface between the circulatory system and the outside world, a place where oxygen can be drawn into the body through the thin membranes of the alveoli to be absorbed by red blood cells and bound by the hemoglobin molecules within, to be carried to every point in the body.  The lungs are also the place where carbon dioxide, also bound by hemoglobin and brought to lungs for disposal, can pass back out and be exhaled.  Much of this system is automatic and completely involuntary, and some of it isn't even controlled by the brain, at least not directly -- you can hold your breath, for instance, but you do have to consciously think about not breathing.  Your brain does have some say in how fast everything works, sending a message to your heart and lungs during times of stress or exertion to say, "Hey!  We're working kind of hard here; maybe we need more oxygen to the muscles!  Work a little faster, please!" and you start to breathe hard and your heart starts to beat faster.
92651
The immune system is made up of three major components:  \nCentral lymphoid organs & tissue\nPeripheral "           "             "\nAccessory  "           "             "\nThe Lymphatic system is sometimes condsidered part of the circulatory system.  It is composed of the lymphatic vessels, lymph fluid, lymph nodes, thymus gland and spleen.  The system transports fluid (tissue fluid) from the tissues back to the bloodstream and carries certain fatty substances away from the digestive organs.  Lymphatic organs also aid in defending the body against infections by removing particles such as microorganisms from the tissue fluid.  In addition, it supports the activities of certain cells (lymphocytes) that produce immunity by reacting against specific disease-causing agents.
454395
To circulate the blood.\n\nOf course, blood circulation is so important because it carries oxygen and nutrients to tissues, and carries wastr products, especially Carbon Dioxide, away from the tissues.