The Muscular system

                                                           The Muscular system
           The muscular system is what helps us be more strong and helps organisms with movement and helps them survive by being strong and allowing them be flexible. The importance of the muscular system is that it controls our movement in the body, stability and posture, heat production, circulation, help in digestion, shaping the body, and maintaining posture. Without the muscular system, organisms wouldn't be able to protect themselves or have strength to run or jump or be able to hold things (we would be weak). The muscular system is very important because it makes us move and also breathe and live too. Organisms uses their muscles for movement and need oxygen for their muscles in order to move and have strong muscles.


    The earthworm has a muscular system that helps it move and makes it flexible. It has two kinds of muscles: longitudinal, and circular.  These muscles help the worm move and all it does is pressing all of the muscles forward. The worm  uses bristles otherwise known as satae to move.The worm has fewer muscles compared to the other organisms . Humans have muscles in the arms and legs but the worms don't. Its advantage of muscles is when the circular muscles move,  the worm's body becomes thinner. Humans cannot do this. This is easier fro the worm to allow it to become smaller and to fit into smaller things and also to hide itself. The worm's disadvantage is to move faster from predators and to carry and push stuff around in the ground to move out of the worm's way.

 The crayfish has strong abdominal muscles that helps it swim backward fast. The crayfish has other muscles in its body like the pinchers, legs, mandibles, and stomach. A advantage of the muscles of a crayfish is that it can move quickly to get away from a predator and to fight back using its claws. A disadvantage of the crayfish's muscular system is that it can get destroyed or broken and  the tail and claws sometimes isn't strong enough to fight back most of time.




      

Movement of frog jumping.

         A example of an organism that has a strong muscular system is the grass frog. Frogs don't have powerful arms, but they have strong legs that can help them leap to long distances. They also have a strong jaw that allows them to catch food with their tongue and clump their jaw down really hard. Frogs have muscles attached to their skeleton. They use their hind legs to push itself with some support from their front arms. Frogs have a strong, muscular stomach for when they land on their stomach. Their main movement is leaping, known as locomotion. A advantage of the frog is that it can move around fast and go to long distances and to also avoid predators. A disadvantage is getting energy from meals in order to jump and to move away from predators.


         Rats have a similar muscular system compared to the human's muscular system. The rat's muscles work in groups, which mean that their muscles work together whenever the rat moves around. When the rat moves, they expand their bones. The rat is very flexible and a advantage for this is that it is easier for the rat to go into smaller areas or spaces. The rat has four feet for fast movement. A advantage of this is that it can run awy faster from predators. Its muscular system is almost the same structure as the  human's. Some disadvantages is very similar to us like broken bones and ripped muscles.
 

           





       Humans have a very interesting muscular system, which is made up of more of 600 muscles and is counted of 40% of the body weight. Muscles are made of fibers and cells. Muscles helps you move about everything like running, walking, lifting weights and heavy stuff, and help the body by pumping blood. Muscles are both involuntary or voluntary. Involuntary muscles are muscles that helps function the body automatically, the ones that you don't have control of. Voluntary muscles are muscles that you can control. There are three kinds of muscles in the human muscular system: the skeletal muscle; the cardiac muscle; and the smooth muscle.

•     Skeletal muscles: striated and voluntary control.(Ex. biceps(arm), pectorals major(chest))

• Smooth muscles: are not striated and are not in voluntary control. ( Ex. organs and blood vessels). Smooth muscles has one nucleus.

•   Cardiac muscle: the heart, The muscle is striated also has one nucleus.      

     The muscular system is very important because it has advantages to having one like it allows organisms to have strength and to move around. A disadvantage is that it can sometimes lead to broken parts of muscles or even bone because the muscles are attached to the skeleton by tendons. The muscular system and the skeletal system are similar and different because they both help our body with movement but they both have different parts for controlling our movement like our bones provide protection for our organs and our muscles helps us with the body shape and helps control stability and posture.