Outline of The Circulatory System

Here is another outline of the Circulatory System that I made for my anatomy class and if you want to check out some other ones that you need then look up other things to to with the systems of the human body. and please like.

Outline of Circulatory System and Figures

  1. The Circulatory System

    1. Functions of the Circulatory System

      1. the transport of a living organism

      2. the human circulatory system consists of the heart, a series of blood vessels, and the blood that flows through them

    2. The Heart

      1. located near center of your chest

      2. entirely of muscle and is a hollow organ that is about the size of your clenched fist

      3. heart is enclosed in a protective sac of tissue called the pericardium

      4. in the walls of the heart, there are two thin layers of epithelial and connective tissue that form a sandwich around a thick layer of muscle called the myocardium

        1. powerful contractions produced by the myocardium pump the blood throughout the body

      5. every 72 time the heart pumps it pumps about 70 milliliters of blood with each contraction

      6. dividing the right side of the heart from the left side of the heart is the septum

        1. septum prevents the mixing of oxygen-poor and oxygen-rich blood

      7. on each side of the septum are two chambers the upper chamber, which receives the blood, it the atrum and the lower is the ventricle which pumps blood out of the heart

          1. Heart has 4 chambers total

        2. Circulation Through the Body

          1. the heart acts as two separate pumps

          2. the right side of the heart pumps blood from the heart to the lungs

            1. this pathway is know as pulmonary circulation

            2. in the lungs the carbon leaves the blood and oxygen is absorbed

            3. the oxygen-rich blood then is pumped to the rest of the body

              1. this pathway is called systemic circulation

        3. Circulation Through the Heart

          1. Blood enters the heart through the right and left attria

          2. heart contracts, blood flows inot the ventricles and then out from the ventricles the the either the body or the lungs

          3. there are flaps of connective tissue called valves

            1. blood moving from the atria holds the valves open, when the ventricles contract, the valves close, which prevents blood from flowing back into the atria

          4. at the exits from the right and left ventricles, therea re calces that prvent blood that flwos out of the heart from flowing back in

        4. Heartbeat

          1. two networks of muscle fibers in the heart

            1. one in the atria and one in the ventricles

            2. when network is stimulated, all the fibers are stimulated and the network contracts as a unit

              1. each contraction begins in a small group of cardiac muscle cells, sinoatrial node, located in the right atrium

              2. because these cells “set the pace” the heart as a whole by starting the wave of muscle contraction through the heart, they are also called the pacemaker

            3. impulse spereads from the pacemaker to the network of fibers in the atria

            4. it is then picked up by a bundle of fibers called atrioventricular node

            5. then when the muscle contracts blood flows out of it

            6. your heart can beat faster or more slowly, depending on your body’s need for oxygen-rich blood

    3. Blood Vessels

      1. blood leaving the left side of the heart is loaded with oxygen form he lungs, when it leaves the left ventricle the blood passes into a large blood vessel know as the aorta

      2. as blood flows through the circulatory system, t moves through threes types of blood vessels-arteries, capillaries, and veins

        1. Arteries

          1. large vessels that carry blood from the heart to the tissues of the body are arteries

          2. arteries are the superhighways of the circulatory system

          3. all arteries carry oxygen-rich blood except for the pulmonary arteries

          4. arteries have thick walls to help them with stand pressure

        2. Capillaries

          1. the smallest of the blood vessels are the capillaries

          2. are the side stress and the alleys of the circulatory system

          3. walls of the capillaries are only one cell thick and most are so narrow that blood cells must pass through them in single file

          4. they bring nutrients and oxygen to the tissues and absorbing carbon dioxide and other waste products it also gives tissues oxygen

        3. Veins

          1. once blood has passed through the capillary system, it must be returned to the heart, this is the job of the veins

          2. the walls are the same as the arteries

          3. large veins have valves that keep the blood flowing to the heart

          4. blood often occurs against gravity

    4. Blood Pressure

      1. like any pump the heart produces pressure

      2. blood pressure decreases when the heart is relaxed and it increases when the heart is stressed

    5. Diseases of the Circulatory System

      1. unfortunately diseases of the circulatory system are all to common

      2. high blood pressure and a condition known as atherosclerosis are tow of the main causes of cardiovascular diseases

      3. atherosclerosis is a condition in which fatty deposits call plaque build up on the inner walls of the arteries

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  1. good research thanks for the information

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