increased pressure and blood vessel diameter result in increased blood flow. Introduction In humans‚ the pumping of blood is essential to life. A consistent blood flow is achieved by the cardiac cycle. This cycle is controlled by the autorhythmic tissues of the heart (Wibbels & Vickery 2007). The cardiac cycle consists of two phases: the systole‚ or contraction phase‚ and the diastole‚ or relaxation phase. The wave of depolarization across the heart’s tissues is regulated by these autorhythmic
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Purpose The purpose of this experiment was to become familiar with the electrocardiograph to help us determine the electrical activity of the heart. As well as‚ to observe how exercise and different body positions(conditions) can affect the activity of the heart. Introduction Trained professionals can look at the EKG tracing and determine if the heart is normal or if the heart is abnormal. “An ECG records the electrical activity of the heart. The heart produces tiny electrical impulses which spread
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ANIMAL TISSUES 1. Classify the animal tissues. On the basis of the function they perform‚ animal tissues are classified into four different types. They are: i) Epithelial tissue ii) Connective tissue iii) Muscular tissue iv) Nervous tissue 2. What are epithelial tissues? What are the characteristic features of these tissues? The covering or protective tissues in the animal body are called epithelial tissues. They also perform the functions of secretion and absorption
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or tubular organs of the digestive‚ respiratory‚ urinary‚ and reproductive tracts. 3. Click the “Cardiac Muscle Tissue.” a. Identify each of the following: • Intercalated Disc ---------------------------------------------------------------------------- • Nucleus ------------------------------------------------------------------------- • Cardiac muscle fiber (cell)------------------------ • Striations--------------------------------------
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intensity for longer. These changes mainly occur in the heart‚ lungs and muscles. This table shows the changes that occur in our body after long term exercise. Cardiovascular system Respiratory system Muscular system Skeletal system Energy systems Cardiac hypertrophy Increased vital capacity Hypertrophy Increase in bone strength Increased muscular stores for ATP and PC Lower resting heart rate Increased strength of respiratory muscles Increase in tendon strength Increased production of synovial
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ensure they remain law-abiding. 3. Serve Justice‚ they ensure the offenders are paying back victims and society‚ establish community service programs‚ monitor restitution payments‚ give consequences for poor behavior‚ including curfews‚ house arrest‚ short incarceration periods‚ and electronic monitoring or GPS. Probation Organization Probation officers serve two separate and often conflicting roles; law enforcement and social worker. For instance‚ if an offender has a positive drug test
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contain sarcomeres‚ which are made up of thick protein filaments known as actin and myosin. All of these components make up the two types of fibers‚ slow-twitch and fast-twitch. The muscles also contain 3 distinct tissues known as cardiac‚ skeletal‚ and smooth. Both cardiac and smooth muscle cells are under involuntary control and are located in the walls of organs; however‚ the skeletal fibers occur in muscles which are attached to the skeleton and are under voluntary control. Muscles are specialized
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conversion of heat energy into chemical energy. 3) Skeletal muscle A) is striated. B) is under voluntary control. C) is primarily regulated by hormones from the endocrine system. D) A and B are correct. E) A‚ B and C are correct. 4) Cardiac muscle A) is found in the walls of blood vessels and in the heart. B) is largely under voluntary control. C) is striated. D) contraction is dependent on stimulation by the nervous system. E) is unaffected by hormones. 5) Smooth muscle
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Body Systems of Various Organisms All organisms in the world have a range of systems and organs in their body. Some organisms may share similar body systems while others have absolutely nothing in common. Several of those organisms include humans‚ pigs‚ crayfish‚ and earthworms. From their mushy‚ gushy organs to their soft‚ gentle skin‚ you may think‚ “How are humans and pigs possibly alike? Or a crayfish and an earthworm?” In many ways they may not be‚ but in other ways‚ they are very much alike
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genetic conditions characterized by progressive muscle weakness and wasting (atrophy). The Duchenne and Becker types of muscular dystrophy are two related conditions that primarily affect skeletal muscles‚ which are used for movement‚ and heart (cardiac) muscle. These forms of muscular dystrophy occur almost exclusively in males. Duchenne and Becker muscular dystrophies have similar signs and symptoms and are caused by different mutations in the same gene. The two conditions differ in their severity
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