Thekey difference在骨骼肌和心肌之间skeletal muscle is under voluntary control while cardiac muscle is under involuntary control.
Muscle tissue是动物体内存在的四种组织之一。它具有收缩的能力，以促进身体的不同部位的运动。因此，肌肉组织是收缩组织. It originates from the mesoderm layer of embryonic germ cells. Based on the function, there are three main types of muscle tissues as skeletal muscle, cardiac muscle andsmooth muscle.Among three different types, smooth muscle and cardiac muscle work involuntarily since their contraction occurs without conscious thought. In contrast, skeletal muscle works voluntarily as their contraction occurs with conscious thought. Moreover, cardiac muscle is present in the heart walls of vertebrates while skeletal muscle facilitates movements of our body by anchoring to the bones by肌腱.
What is Skeletal Muscle?
Cardiac muscle is one of the three types of muscle tissue present in the walls of the heart, especially in the myocardium of the heart. Similar to skeletal muscle, cardiac muscle is also a striated muscle. But, it works involuntarily unlike the skeletal muscle. Cardiomyocytes or cardiac muscle cells are the cells that make the cardiac muscle. These cells have one, two or rarely three or four nuclei. Cardiac muscle cells depend on the blood supply to deliver oxygen and nutrients as well as to remove the waste products. Due to the coordinated contraction of heart muscle cells, blood circulation takes place in the circulatory system. For efficient functioning of the heart, cardiac muscles have a large number of mitochondria, numerous myoglobins, and good blood supply.
心脏的肌肉也表现出横条纹的lternating thick and thin filaments. Under the electron microscope view, actin filaments appear as thin bands while myosin filaments appear as thick and darker bands. Cardiac muscle fibres are mostly branched. T-tubules in the cardiac muscle are larger, broader and run along the Z-Discs. Intercalated discs connect cardiac myocytes to an electrochemical syncytium and are responsible for force transmissions during muscle contraction. T-tubules play an important role in excitation-contraction-coupling (ECG).
- Skeletal muscle and cardiac muscle are two of the three types of muscles present in our body.
- Both are striated muscles.
- Therefore, they contain myofibrils and sarcomeres.
- Moreover, they are packed into highly regular arrangements of bundles.
What is the Difference Between Skeletal Muscle and Cardiac Muscle?
Skeletal muscle is the type of muscle attached to the skeleton by tendons while cardiac muscle is the muscle found in the walls of the heart. Thus, this is the key difference between skeletal muscle and cardiac muscle. Furthermore, skeletal muscle works under the voluntary control of the somatic nervous system while cardiac muscle works under involuntary control. Moreover, skeletal muscles are present in almost all part of the animal body while cardiac muscles are present only in the myocardium of the heart. This is another important difference between skeletal muscle and cardiac muscle.
The below infographic summarizes the difference between skeletal muscle and cardiac muscle.
摘要 - 骨骼肌与心肌