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Transcript of Circulatory System
Biology CP Period 5 Pulmonary
Circulation What Are
For? What is
Blood? Red Blood Cells What is the Cardiovascular System? Functions of the Circulatory System:
-Transports Oxygen and removing Carbon Dioxide
-Transports nutrients and removes wastes
-Regulates body temperature The heart: See function later in presentation. Cardiovascular System-
The heart and blood vessels considered as a whole. Cardiovascular System What does the Circulatory System contribute to all the other organs systems in the body? http://www.youtube.com THE HEART:
The Most Important Organ
in the Cardiovascular
System. Pulmonary Systemic The right side of the heart pumps oxygen-poor blood from the heart to the lungs. The left side of the
heart pumps oxygen-rich
blood to the rest of the body. Who: The Heart
What: A Muscle
Where: Located behind and slightly to the left of your left breast bone
When: The heart pumps 5 quarts of blood every minute; 1800 gallons every day
Why: To circulate blood throughout the body Capillaries are the very tiny blood vessels that carry oxygen to the hard to reach places in the body. Some capillaries are so thin, that the blood cells have to travel through it single-file (one at a time). White Blood Cells Platelets White blood cells, or leukocytes, are considered the army of the circulatory system. White blood cells guard against infection, fight parasites, and attack bacteria. The body can increase the number of active white blood cells dramatically while battling foreign invaders. Platelets are small cell fragments that break off bone marrow making blood clotting possible. Plasma Red blood cells, or erythrocyts, are the most numerous cells in the blood. The main function of red blood cells is to transprot oxygen, but they also transport some carbon dioxide to the lungs. Plasma, the liquid portion of blood, is about ninety percent water and ten percent dissolved gases, salts, nutrients, enzymes, hormones, waste products, plasma proteins, cholesterol, and other important compounds. plasma Capillaries are the smallest blood vessels that allow oxygen and nutrients to diffuse from blood into tissues, and carbon dioxide and other waste products to move from tissues into blood. Arteries are large vessels that carry blood from the herat to the tissues of the body. Arteries have thick elastic walls that help them withstand the powerful pressure produced when the heart contracts and pumps blood through them. Veins carry blood from different parts of the body toward the heart. They are often found near and between skeletal muscles, flowing against gravity. These large veins also contain valves. Valves ensure blood contines to flow in one direction. Arterioles carry blood away from the heart and out the tissues of the body like arteries; however, they also are important in blood pressure regulation. The structure of an arteriole is also simular to the structure of an artery. Arterioles are strong, have a relatively thick wall for their size, and contain a high percentage of smooth muscle. Venules are in charge of fluid and macromolecular exchange. They are small exchange vessels composed of endothelial cells surrounded by basement membrane and smooth exchange. Capillaries are the smallest blood vessel that allow oxygen and nutrients to diffuse from blood into tissues, and carbon dioxide and other waste products to move from tissues to blood. Capillaries are small exchange vessels composed of very thin endothelial cells surrounded by no smooth muscle. Arrhythmia What is Arrhythmia?
Arrhythmia is a condition in which the heart beats with an irregular rhythm. Arrhythmia refers to any change from the normal sequence of electrical impulses causing the heart to beat too fast, too slowly, or erratically. When the heart doesn't beat properly, it can't pump blood effectively causing the lungs, brain and all other organs to not work correctly. This increases the chance of them shutting down or being damaged. Symptoms:
Arrhythmia is extremely common, especially as you get older. Each year millions of people get this heart condition. Most cases are harmless, but some are extremely dangerous. Arrhythmias can produce a broad range of symptoms. Some of these symptoms are:
• A fluttering in your chest
• A racing heartbeat (tachycardia)
• A slow heartbeat (bradycardia)
When arrhythmias last long enough to affect how well the heart works, more serious symptoms may develop, such as:
• Fainting or near fainting
• Shortness of breath
• Chest pain
• In extreme cases, collapse and sudden cardiac arrest When to See a Doctor
If you suddenly or frequently experience any of these symptoms at a time when you wouldn’t expect to feel them, then you should seek urgent medical care. Treatment/ Treatment Goals
Once your doctor has diagnosed you have arrhythmia, he or she will determine if it is harmless or dangerous. If your arrhythmia is abnormal and clinically significant, your doctor will set up a treatment plan. The goals of a treatment plan are:
• Prevent blood clots from forming to reduce stroke risk
• Control your heart rate within a relatively normal range
• Restore a normal heart rhythm, if possible
• Treat heart disease/condition that may be causing arrhythmia
• Reduce other risk factors for heart disease and stroke Works Cited
"About Arrhythmia." Arrhythmia. American Heart Association, 17 Oct. 2012. Web. 10 June 2013. <http://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/About-Arrhythmia_UCM_002010_Article.jsp>.
Arrhythmias. American Heart Association. American Heart Association, n.d. Web. 10 June 2013. <http://watchlearnlive.heart.org/CVML_Player.php?moduleSelect=arrhyt>.
"Capillary Function." The Biology Place. Pearson, n.d. Web. 10 June 2013. <http://www.phschool.com/science/biology_place/biocoach/cardio2/capillary.html>.
"Heart Contraction and Blood Flow." NIH. U.S. Department of Health & Human Services, 17 Nov. 2011. Web. 10 June 2013. <http://www.nhlbi.nih.gov/health/health-topics/topics/hhw/contraction.html>.
"Heart Rhythm Disorders." WebMD. WebMD, n.d. Web. 10 June 2013. <http://www.webmd.com/heart-disease/heart-rythym-disorders>.
"Heart Structure and Function ." American Heart Association. American Heart Association, n.d. Web. 10 June 2013. <http://www.towson.edu/wellness/documents/HeartStructureandFunction.pdf>.
Klabunde, Richard E., ed. "Microcirculation Structure and Function." Cardiovascular Physiology Concepts. Richard E Klabunde, 16 Apr. 2007. Web. 10 June 2013. <http://www.cvphysiology.com/Microcirculation/M014.htm>.
Miller, Kenneth R., and Joseph S. Levine. "Circulatory and Respiratory Systems." Miller and Levine Biology. Boston, MA: Pearson, n.d. 948-55. Print.
Rhythm, Rhyme, Results, prod. Circulatory System. By Mark Owen. YouTube. Google, 7 Sept. 2009. Web. 10 June 2013. <http://www.youtube.com>
"What are the symptoms of arrhythmias?" MedicineNet. WebMD, n.d. Web. 10 June 2013. <http://www.medicinenet.com/arrhythmia_irregular_heartbeat/page2.htm#what_are_the_symptoms_of_arrhythmias>. http://watchlearnlive.heart.org/CVML_Player.php?moduleSelect=arrhyt