Circulatory System and Nervous System Reviewer

Topics: Blood, Heart, Blood vessel Pages: 5 (1482 words) Published: July 31, 2013
PERIPHERAL CIRCULATION
DEFINITION:
PERIPHERAL- Relating to or situated in the periphery of an organ or part of the body in relation to a specific reference point. Away from the center of the body. PERIPHERY – the part of the body away from the center.

CIRCULATION –movement in the regular course, as the movement of the blood through the heart and vessels. PERIPHERAL CIRCULATION-transport, passage, or movement of blood away from the center (heart), the route is the upper and lower extremities then back to the center (heart) again. I. CIRCULATORY SYSTEM

the main transportation and cooling system of the body.
responsible for transporting materials throughout the entire body. It transports nutrients, water, and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce.  fluid distribution network

PARTS OF THE CIRCULATORY SYSTEM:
The Heart, The Blood, and The Blood vessels.
HEART
Heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist. An average adult contains 4.7 to 5.7 liters of blood Responsible for pumping blood throughout the blood vessels by repeated rhythmic contractions By the end of a long life, a person's heart may have beat (expanded and contracted) more than 3 billion times. FOUR CHAMBERS OF THE HEART:

1.Right atrium - receives deoxygenated blood from the superior and inferior vena cava and pumps it into the right ventricle via the tricuspid valve 2.Right Ventricle - receives deoxygenated blood from the right atrium via the tricuspid valve and pumps it into the pulmonary artery via the pulmonary valve 3.LEFT ATRIUM- receives oxygenated blood from the pulmonary veins and pumps it into the left ventricle via the mitral valve. 4.LEFT VENTRICLE - receives oxygenated blood from the left atrium via the mitral valve, and pumps it into the aorta via the aortic valve. The largest and strongest chamber in the heart. ATRIOVENTRICULAR SEPTUM– walls that divides the upper and lower chambers of the heart. LAYERS OF THE HEART

1.ENDOCARDIUM - is the inner layer of tissue that lines the chamber and inner cavities of the heart. Made up of endothelium cells and connective tissue 2.MYOCARDIUM -is the middle and thickest layer of the heart wall, composed of cardiac muscle. is the middle and thickest layer of the heart wall, composed of cardiac muscle 3.EPICARDIUM - Is the outer layer of the wall of the heart. Also known as the visceral pericardium. Composed of connective tissue covered by epithelium. Provides an outer protective layer for the heart. HEART VALVES

1.TRICUSPID VALVE -regulates blood flow between the right atrium and right ventricle. Has three papillary muscles. 2.PULMONARY VALVE (pulmonic valve) – semilunar valves of the heart that lies between the right ventricle and pulmonary artery 3.MITRAL VALVE / BICUSPID / ATRIOVENTRICULAR- dual flap valve in the heart that lies between left atrium and left ventricle. 4.AORTIC VALVE – lies between the left ventricle and the aorta, it is where the oxygenated blood passes and distributes to the body.

THE BLOOD - a specialized bodily fluid that delivers necessary substance to the body’s cells such as nutrients and oxygen. It also helps to maintain body temperature and homeostasis. Transports hormones, and fights infections. Is the fluid that the heart pumps BLOOD PLASMA - is the yellow liquid component of blood, in which the blood cells would normally be suspended, it makes up about 55% of the total blood volume. The plasma is more than 90% water and contains a large number of substances. Its major solute is a mixture of proteins. PROTEIN COMPOSITION:

ALBUMIN – maintains osmotic pressure and blood volume. Made in liver GLOBULINS - is an antibodies, produced by lymphocytes, and are carried throughout the body, where many of them fight bacteria and viruses. C. FIBRINOGENS - largest molecules of plasma protein. Has a vital role in...
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