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an overview of the blood circulation of the heart in a human body
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OVERVIEW
OF CIRCULATION
THE MAIN FUNCTION OF THE CIRCULATIONTO SERVE THE NEEDS OF THE TISSUES BY :
TRANSPORTING OXYGEN AND NUTRIENTS TO THE TISSUES, TRANSPORTING AWAY WSTE PRODUCTS, CARRYING HORMONES FROM ONE PART OF THE BODY TO ANOTHER, MAINTAINING HOMEODYNAMIC CONDITION IN TISSUE FLUIDS OF OPTIMAL SURVIVAL AND FUNCTION OF THE CELLS
THE CIRCULATIONDIVIDED INTO TWO PARTPULMONARY CIRCULATION,
WHICH SUPPLIES THE BLOOD TO THE LUNGS
SYSTEMIC CIRCULATION,
WHICH SUPPLIES THE BLOOD TO THE TISSUES ALL OF THE BODY
THE CIRCULATION IS THE COMPLETE CIRCUIT
THE BLOOD VESSEL THE CONECTING VESSEL: AORTIC
DISTRIBUTION VESSEL: MEDIUM AND SMAL ARTERY
EXCHANGE VESSEL: CAPILARY
RESERVOIR VESSEL: VEIN
BLOOD VESSEL SYSTEM
ELASTIK RECOIL PD AORTA
THE FUNCTION PART OF THE CIRCULATIONTHE ABSORBER VESSEL (AORTA, LARGE ARTERIES):TRANSPORT BLOOD UNDER HIGH PRESSURE, RAPID BLOOD FLOW
THE RESISTANCE VESSEL (ARTERIOLE), CONTROL OF BLOOD FLOW
THE EXCHANGE VESSEL (CAPILLARIES, VENULES): WHICH EXCHANGE OF OXYGEN, NUTRIENS, FLUID AND OTHER SUBSTANCES BETWEEN THE BLOOD AND INTERSTITIIL FLUID
RESERVOIR VESSEL: CONDUITS AND RESERVOIRS OF BLOOD
THE ARTERIOL AND CAPILARY
ARTERIOL OR RESISTANCE VESSELTO CONTROL OF BLOOD FLOW TO THE TISSUE:
RELAXATION OF SPHINCTER INCREASES THE BLOOD FLOW
CONTRACTION OF SPHINCTER DECREASES THE BLOOD FLOW
THE CAPILARYOR AXCHANGE VESSELEXCHANGE OF:
O2 WITH CO2
NUTRIENT WITH WASTE PRODUCT
ETC.
END ARTERIESSUPPLAY DISCRETE REGIONS OF TISSUES THAT NOT DIRECT ANASTOMOSES BETWEEN THEM
NO COLLATERAL SUPPLAY
IN THE HEART, LIVER, KIDNEY, BRAIN, GASTROINTESTINAL TRACT
VEINSLARGE OF LUMINA
THIN AND RELATIVELY NON MUSCULAR WALLS
RELATIVELY COMPRESSIBLE BY EXTERNAL FORCES BLOOD FLOW
VALVES IN MANY VEIN, SUPPORT FLOW OF BLOOD TOWARD THE HEART
PRESSURE GRADIENTS BETWEEN THE PHERIPHERAL AND THE RIGHT HEART CONTROL VENOUS FLOW
ARTERIOVENOUS ANASTOMOSESDIRECT TRANSFER OF BLOOD FROM ARTERIAL TO VENOUS CHANNELS
BYPASSING THE CAPILLARY BED
USUALLY ACCUR IN ORGANS THAT FUNCTION INTERMITTENTLY : GUT, SKIN
BASIC CONTROL OF CIRCULATORY FUNCTIONTHE ABILITY OF EACH TISSUE TO CONTROL ITS OWN LOCAL BLOOD FLOW IN PROPORTION TO ITS METABOLIC NEEDS (AUTOREGULATION)
NERVUS CONTROL MORE GLOBAL FUNCTIONS:
REDISTRIBUTION OF BLOOD FLOW TO DIFFERENT AREAS, REGULATING HEART PUMPING, RAPID CONTROL OF SYSTEMIC ARTERIAL PRESSURE
DISTRIBUTION OF BLOODCARDIAC: 7 %LUNG: 9 %ARTERIAL: 13 %ARTERIOLE: 2 %CAPILARY: 5 %VEIN: 64 % (RESERVOIR
VESEL)
DISTRIBUTION OF BLOOD REST AND MOD.EXERCISE Git: 27% (1350)4.8% (600)Kidney: 20% (1000)4.4% (550) Skin: 9% (450)13.6%(1700)Brain: 13 % (650) 5.2% (650)Cardiac : 3 % (150) 4.4% (550)Muscle: 15% (750)64% ( 8000)Bone, others: 13 % (650) 3.6% (450) TOAL: 5000 ML/M 12.500 ML/M
THE DISTRIBUTION OF BLOODKIDNEY, GIT, SKIN :
IMPORTANCE FOR HOMEOSTASIS THE DISTRIBUTION OF BLOOD ACCORDING TO THE HUMAN CONDITION
THE BRAIN:
VERY IMPORTANCE ORGAN, ITS PERMANENT NICROSIS WITHOUT BLOOD MORE THAN 4 MINUTE
LYMPHATIC SYSTEMEXTENSIVE NETWORK
VARIABLE LYMPHATIC VESSELS AND NODES
SERVE AS FILTERS AND SOURCE OF LYMPHOCYTES AND PLASMA CELLS
THE LYMPHATIC VESSELS FROM THE TISSUES FORWARD THE LYMPHATIC FLUID TO THE RIGHT VENTRICEL THROUGH VENA CAVA
LYMF CIRCULATION