logoliner.blogg.se

Write stomach here just to jog your memory. And hollow organs could beĪnything from- let's say, your stomach would That'll get you aboutĪnd hollow organs are what you should think about. Those aren't the only ones,īut those are the major ones. So what about smooth muscle? Where can you find

So in the heart, you canįind specialized cells that were so interesting Muscle that we have in our body would be related to the heart. Of cardiac muscle out there? And the answer is yes. But what about the other two? What about the cardiacĪnd smooth muscle? I mean, you might wonder,ĭoes cardiac mean heart? And is that the only type You, is every muscle in the body attached Like a flat tendon, and we call that an aponeurosis. Really a flat tendon, or something that looks So you've got these muscles thatĪre kind of coming in to not really a tendon but And you guessed it,Īnother external oblique. To fibrous tissue on the other side, because, ofĬourse, your body is symmetric and so you've got fibrous Well, in a sense, I guess, youĬould think of it as a tendon, but it's like a flat tendon. This muscle is actually not attached to a tendon. The muscle we just drew is a muscle called theĮxternal oblique muscle. Muscle have to be attached to a tendon and bone? Well, the answer Muscle is going to be attached to a tendon and bone. And so this tendon isĪttaching it to the bone and allowing it to And this muscle is going toīe attached by way of tendon. And so this muscle isĪttached to the femur. I guess not so little, right? This as the largestīone in the body. And so you've got thisĪttached to a bone. But let's say your leg is movingīecause you're playing soccer. You might have, for example-Ī really easy one would be, maybe, let's say The different types of movements that mightĭifferent movements. Muscles, the word I want you to start thinkingĪbout in your head is movement. And I thought it wouldīe helpful to have a picture, because then weĬan actually draw on there and show where the different Human body on the right, kind of a figure of it. The smooth muscles do not function as one unit, and skeletal, voluntary muscles are out of the question. Without cardiac muscle, the immediate, involuntary, and synchronized contractions will go as well. Even if the all the missing smooth muscles were to be replaced with the other two types of muscles, you would still have problems (processes like digestion, which need muscles contracting at different times, would suffer if they contracted at the same time like a heart-and imagine telling yourself to digest your food!). Without the smooth muscles, several body systems will stop or be severely inefficient. You can't walk to get some food, or raise your hand, or move your eyes, and you can't even breathe (yes, the diaphragm is skeletal). Without the skeletal muscles, you can't really move. While you can say that the vestigial muscles (I.E: muscles of the ear) are less important than the others-as they no longer have a function-the other muscles of the body each have their own important functions.Īll three types of muscles (that are not vestigial) do have some type of importance to the body. It is hard to rank them all because each of them have a good argument for being the best muscle. Try checking out an older, possibly retired, khan academy video for some clarification. Finally, although the smooth muscle cells do not rely on oxygen to contract, they contract the slowest of all the muscle types due to a different mechanism of contraction. The contraction is much slower, and is also controlled by a pacemaker region. The cardiac muscle cells function aerobically and have more than ten times the number of mitochondria than skeletal muscle. Slow twitch, or type 1 muscle fibers, have more mitochondria compared to type 2, which means they need more oxygen to get energy. This contributes to its ability to contract quickly! Without having to wait around to refill on its supply of oxygen for metabolism, the fast-twitch (type 2) muscle fibers can contract "fast". Most importantly, skeletal muscle can function anaerobically, or without the consumption of oxygen, in addition to aerobically. The fast and slow twitch skeletal muscle, also known as type 2 and type 1 skeletal muscle, have key differences from the cardiac muscle cells, particularly in metabolism. The structure and function of the cardiac and smooth muscle is much different. The fast and slow twitch grouping is for skeletal muscle.