After a while, several cells link up and they begin contracting in synchrony. Discuss what is going on and what type of cells you are looking at. The cells in the dish are cardiomyocytes, cardiac muscle cells. They have an intrinsic ability to contract. When they link up, they form intercalating discs that allow the cells to communicate with each other and begin contracting in synchrony.
Under the light microscope, cells appear striated due to the arrangement of the contractile proteins actin and myosin. Skip to content Learning Objectives Describe the characteristics of muscle tissue and how these dictate muscle function. By the end of this section, you will be able to: Identify the three types of muscle tissue Compare and contrast the functions of each muscle tissue type. External Website. Chapter Review The three types of muscle cells are skeletal, cardiac, and smooth.
Interactive Link Questions Watch this video to learn more about muscle tissue. Skeletal muscle cells are striated. Review Questions. Critical Thinking Questions You are watching cells in a dish spontaneously contract. Why does skeletal muscle look striated? Previous: 4. While the cardiac muscles are semi-spindle, the skeletal muscles are cylindrical in shape. Another difference is that the cardiac muscles are short in comparison to skeletal muscles. The skeletal muscles are attached to the bone through tendons.
The skeletal muscles also contain myoblasts, which form the fibers in the muscles. The cardiac muscles are seen in the myocardium of the heart. The cardiac muscles contain intercalated discs and T-tubules, which connects the myocyte to the synctium. The skeletal muscles are tightly bound together when compared to cardiac muscles. Unlike skeletal muscles, gap junctions are found in cardiac muscles. There is only a common contraction known as synctium in skeletal muscles and no gap junctions.
When the skeletal muscles are multi-nucleated, the cardiac muscles have one or two nuclei. The density of mammalian skeletal muscle tissue is about 1. This can be contrasted with the density of adipose tissue fat , which is 0. Privacy Policy. Skip to main content. Chapter 8: Muscle Strength and Endurance. Search for:. Key Takeaways Key Points Skeletal muscles are attached to bones and allow voluntary movement of the body.
The cardiac muscles are made from muscle fibres in which the cells are branched and multinucleated while the skeletal muscles are made of muscle fibres in which the cells are band shaped and non nucleated.
What are the differences between cardiac heart and skeletal muscle contractile tissue? Jul 31, Explanation: The cardiac muscles are made from muscle fibres in which the cells are branched and multinucleated while the skeletal muscles are made of muscle fibres in which the cells are band shaped and non nucleated.
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