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Histology- Circulatory System Presentation Transcript
Circulatory system THE SYSTEM OF OUR BODY RESPONSIBLE FOR TRANSPORT OF NUTRIENTS, ELIMINATION OF METABOLIC WASTES AS WELL AS REGULATION OF BODY TEMPERATURE. DIVIDED INTO: BLOOD VASCULAR SYSTEM LYMPH VASCULAR SYSTEM
BLOOD VASCULAR SYSTEM: COMPRISES A CIRCUIT OF VESSSELS THROUGH WHICH BLOOD FLOW IS INITIATED BY THE CONTINOUS ACTION OF A CENTRAL MUSCULAR PUMP CONSIST OF THE FF. HEART ARTERIAL SYSTEM VENOUS SYSTEM CAPILLIARIESBack
Lymph VASCULAR system: IS A NETWORK OF DRAINAGE VESSES FoR RETURNING EXCESS EXTRA-VASCULAR FLUID TO THE BLOOD CIRCULATORY SYSTEM CONSIST OF THE FF. LYMPH VALVE LYMPH vessels
HEART THE MUSCULAR ORGAN RESPONSIBLE OF PUMPING BLOOD THROUGHOUT OUR BODY
HEART Purkinje fibers • Relays cardiac impulses to the ventricular cells causing the ventricles to contract.
VENTRICLE WALL • Right ventricle: Receives blood from the right atrium and pumps it to the main pulmonary artery. • Left ventricle: Receives blood from the left atrium and pumps it to the aorta.
Heart valve control the flow of blood through the heart by opening and closing during the contractions of the heart.
EPICARDIUM Consist of dense sheet of fibrocollagenous tissue, the other surface is formed with flat mesothelial cells. consist of large ranch of coronary artery with smaller branch penetrating the myocardium
MYOCARDIUM Consist of cardiac muscle fibres which forms the intercalated discs.
endocardium It has a surface layer of flattened endothelial cells supported by a fibrous layer containing variable amounts of elastic fibres. Part of the heart where purkinje fibres can be seen Back
Elastic arteries Largest single blood vessel in the body. This vessel carries oxygen-rich blood from the left ventricle to the various parts of the body.
arterioles type of vessels in the arterial system which serves as the terminal branches of the arterial tree, supplying the capillary bedsBack
capillaries Extremely thin-walled vessels forming an interconnected network in which microcirculation mainly occurs.Slide 3 Back
muscular venules Characterized by a clearly defined intimal layer devoid of elastic fibres and a tunica media consisting of one or two layers of smooth muscle fibers.
vein with valve The valve consist of delicate semilunar projections of the tunica intima of the vein wall.
small vein Characterised by a thicker muscular wall and a poorly developed internal elastic lamina.
medium size vein In veins the tunica media is thinner compared to an artery, usually in veins, tunica adventitia is the thickest layer of the vessel wall.
large muscular vein It has a very narrow tunica intima, but the media is more substantial , consisting of several layers of smooth muscle, separated by collagenous connective and scanty elastic tissues. The tunica adventitia is broad and composed of collagen, contains numerous vasa vasorum . Elastic fibres are prominent at the junction bet. Media and adventitia.
inferior vena cava one of the two main veins bringing de- oxygenated blood from the body to the heart. Back
lymph valve SUPPORTING TISSUE ARE MOSTLY CONSIST MERELY OF RETICULI FIBRES AND A LITTLE GROUND SUBSTANCE.
lymph vessels SHOWS SMALL LYMPHATIC VESSELS CONTAINING A VERY SMALL AMOUNT OF SMOOTH MUSCLE IN THEIR WALLS.
AssignmentInterview a person fromyour neighbour who issuffering from hypertensionand ask him/her abouttheir usual diet.