11.Circulation+NEW+10-15-14+copy

11.Circulation+NEW+10-15-14+copy - CIRCULATION a deliver02...

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CIRCULATION 1. Functions of Circulatory System: a. deliver 0 2   b.  remove C0 2 c. distribute nutrients and remove nitrogen wastes (urea,  NH3, & uric acid) d.   transport of hormones e. regulation of body temperature f. protection against disease 2. Division or Parts of the Circulatory System; Heart- functions as two pumps (pulmonary-right side and systemic-left  side). Blood flows  accordingly: Arteries (carries blood away from heart) ---> arterioles--->capillaries  (pass thru tissues)--->  Venules--->Veins-->Vena Cava---> Heart
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The Lymphatic System The lymphatic system  collects capillary filtered  fluid and returns it to the  circulatory system Lymphatic veins and  ducts contain valves to  prevent backflow
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Lymphatic vessels(pickup fluid leaked from capillaries) The four chambered mammalian heart is situated behind and  to the left of the sternum with the apex pointing to the left.  Two coronary arteries come off the aorta and branch several  times to deliver blood to the wall of the heart. They exit the  heart just above the aortic valve at the base of the aorta and  feed blood into capillaries that then pass into a large vein  called the coronary sinus and then into the right atrium.  Blood flow to the heart wall is  about 225 ml/min or 4-5%  of  total blood pumped. Coronary flow is greatest during diastole  because muscle contraction during systole occludes coronary  arteries.
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Components Blood, Vasculature, Heart  Function Transport oxygen, carbon dioxide, nutrients, waste products,  immune cells, signaling cells rather than reling on diffusion.  Large animals move fluid through their bodies by  bulk flow or  convective transport,  not diffusion. Circulatory systems move fluids by increasing the pressure of the  fluid in one part of the body so flows down the resulting  pressure gradient Three main components are needed 1) Pump or propulsive structures 2) A system of  tubes, channels, vessels , or spaces 3) A  fluid  that circulates through the system
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Skeletal muscle Pulsating blood vessels    peristalsis Chambered hearts One way valves help to ensure  unidirectional flow. Closed   Circulation – circulatory  fluid remains within the blood  vessels and does not come in  direct contact with the tissues ypes of Pumps pes  TYPES OF PUMPS  Pumps
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Types of Fluid Interstitial  fluid – extracellular fluid that  directly bathes the tissues Blood  – fluid that circulates within a closed  circulatory system Lymph  – fluid that circulates in the secondary  system of vertebrates called the  lymphatic  system (fluid leaked from blood) Circulatory systems first evolved to  transport 
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