why cardiac muscle is much better adapted for the action of the heart than is skeletal muscle?
832046
Heart muscle never gets tired like skeletal muscle does.
294405
Don't listen to thedestro737. Anyone who studied high school biology knows that tissue is a collection of cells doing the same work, and bones certainly qualify as tissue. If your heart was made of bone tissue, it would not pump. The heart is a muscle, and like any muscle, it contracts, pushing the blood through your veins and arteries. If it were made of bone, it could not do this and you would not be alive. In fact, you would have died long before you were born.
9977
Weak heart muscle.\nThis causes your heart muscle to either become enlarged and weakened or thickened and stiff. It may result from infection, alcohol or drug abuse, or unknown causes.
966426
The reason why it is there is that it is more efficient to have a wall. It separates oxygenated from non-oxygenated blood so only oxygenated blood is sent to muscles.\n\nAmphibians and reptiles don't have a wall separating the oxygenated from non-oxygenated blood, they are alive, but their circulatory system is less efficient because some of the blood travelling to the muscles doesn't contain any oxygen.
126493
I believe its when one or more of the muscles in the heart becomes oversized which in turn disrupts the functions of the heart.
286504
the pulse goes faster when you run because more muscles are being used.  another is that you need to go faster, therefore you need more energy.  our muscles need more oxygen to work faster and longer.  that's why the blood pumps more blood to get to the muscles in your leg.  another, they need to pump harder because you need the energy immediately.  the pulse goes faster because the heart needs to pump blood faster to reach your muscles and harder to reach it faster.
774022
you get very develloped muscles\nthis is how animals do exersizes\nstreching is exelent for the body ,you cant strech enough
1177653
Because muscle weighs 3 times more than fat. You need to be watching your size, not your weight. What's good about having a larger volume of muscle, is that your body consumes more calories even while you are not working out.
1072932
The reason we don't have muscles like our heart is because we don't work our other muscles as hard as are heart.\nIf you work the reps that our heart beats for each group of muscles. We all could lift 10 or better times our weight.\nA good program of strengthening exercises for your muscle groups. Along with running and cardiovascular\nexercises. Will help you be stronger and healthier to live a better life.
225865
A large heart works less efficiently. You want to have a small heart. Your doctor will be able to explain further. Please, ask your doctor.
811305
some muscles especially the striated muscles are made up of two kinds of proteinaceous fibres known as Actin and Myosine. These fibres are contractile in nature and different in colour due to differential quantity of myoglobin ( a kind of pigment). Due to these pigments the striations appear in muscles.
252684
Your body requires more oxigen as you exercise (to oxigenate muscles while they perform their work), thus your heart pumps faster to get blood circulating faster and which also requires your lungs to bring in more oxigen to your blood.
1089779
blood is necessary to sustain all muscles within the body.  The heart is a big muscle.  Muscle needs oxygen in order to survive.  Without a proper blood supply, it will eventually die.
878047
Cardiac remodeling in response to arterial hypertension is a result of myocyte hypertrophy, hyperplasia, and hypertrophy of the nonmuscular cells and interstitial cell growth. (1)  \n\nIn short the muscle gets larger and the other structures such as endothelium and collagen divide and grow.  Some of the cardiac muscle eventually will actually die if the condition continues.
278754
I believe the primary reason for the slow development of the artifical heart is the power pronblem.\n\nThe human heart is a very ppowerful pump.  It has been very difficult to creat something small enough to fit in the space where the heart is located and still provide the same power curve that the normal human heart displays.\n\nEarly artifical hearts were powered externally (outside the body).  Later artifical hearts were powered internally but the pumping action was ;icated outside the hearst compartment.\n\nMy explantion above is my own personal knowledge, here is a link that might help...\n\nhttp://en.wikipedia.org/wiki/Artificial-heart\nhttp://www.chron.com/content/chronicle/metropolitan/heart/heart-history.3-0.html\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6729956&dopt=Abstract\n\n\nI hope this gives you a good start.\n\nBest of luck,\nJeffrey
654478
FAT AND MUSCLE CELLS VARY IN COMPOSITION, AND 1 DOES NOT CONVERT TO THE OTHER. YOU CAN GET INCREASED BODY FAT AND DECREASED MUSCLE MASS IF YOU DONT EXERCISE LIKE YOU SHOULD.
511421
I am surprised that this information is not in your textbook nor presented in your class.  Perhaps you should reread your materials.\n\nAnyway, ventricles are used to pump blood away from the heart.  Atriums received blood from the body and pass it to the ventricles.  Since these areas of the heart are right next to each other, the atriums do not have to work as hard.  This means that they require less muscle mass.  Ventricles move blood to the lungs and to the body.  The blood has a farther distance to travel and the ventricles need to apply more force.  This results in the ventricles having more muscle mass and, therefore, have thicker walls.