What is the structure and function of a muscle cell?
Skeletal muscle cells form elongated fibers in the body. They have multiple nuclei within each cell. This contrasts with the majority of other cells in human bodies. They also contain many mitochondria, cellular organelles that produce adenosine triphosphate (ATP), the body’s fuel.
What is the function of the muscle cell?
Muscle cells are specialized to contract, i.e. create a pulling force to stabilize or move parts of the body. There are three types of muscle cell: skeletal, visceral and cardiac.
What is the cell structure of muscle cells?
As seen in the image below, a muscle cell is a compact bundle of many myofibrils. Each myofibril is made of many sarcomeres bundled together and attached end-to-end. A specialized form of the endoplasmic reticulum, known as the sarcoplasmic reticulum, extends in and around these myofibril bundles.
What is a muscle cell made up of?
Skeletal muscle cells, and cardiac muscle cells contain myofibrils and sarcomeres and form a striated muscle tissue. Cardiac muscle cells form the cardiac muscle in the walls of the heart chambers, and have a single central nucleus.
What is the structure of the muscle?
A muscle consists of many muscle tissues bundled together and surrounded by epimysium, a tough connective tissue similar to cartilage. The epimysium surrounds bundles of nerve cells that run in long fibers, called fascicles. These fascicles are surrounded by their own protective layer, the perimysium.
What are the features of a muscle cell?
Muscle cells contain filaments of protein that slide over each other to cause muscle contraction. The arrangement of these filaments causes the banded appearance of heart muscle and skeletal muscle. They contain many well-developed mitochondria to provide the energy for muscle contraction.
Where is the muscle cell?
Cardiac muscle cells are located in the walls of the heart, appear striped (striated), and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control.
What are the 3 structure of muscles?
Overview. The 3 types of muscle tissue are cardiac, smooth, and skeletal.
What are the 3 main functions of muscles?
The muscular system consists of various types of muscle that each play a crucial role in the function of the body. Muscles allow a person to move, speak, and chew.
What are the types of muscles and their functions?
The three main types of muscle include:
- Skeletal muscle – the specialised tissue that is attached to bones and allows movement.
- Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries.
- Cardiac muscle – the muscle specific to the heart.
How is muscle cell adapted to its function?
They have structures that are adapted for their function. For example, muscle cells bring parts of the body closer together. They contain protein fibres that can contract when energy is available, making the cells shorter.
How are muscles cells adapted to their function?
What is the structure of muscle tissue?
The muscular tissues are bundled together and surrounded by a tough connective tissue similar to cartilage known as epimysium. The bundle of nerve cells that run in long fibers called fascicles are surrounded by the epimysium. The fascicles are surrounded by a protective layer known as perimysium.
What is the muscle cell called?
Muscle cells, commonly known as myocytes, are the cells that make up muscle tissue. There are 3 types of muscle cells in the human body; cardiac, skeletal, and smooth. Cardiac and skeletal myocytes are sometimes referred to as muscle fibers due to their long and fibrous shape.
What are 3 adaptations of a muscle cell?
Muscle cells These layers can slide over each other causing muscle contraction. Muscle cells have a high density of mitochondria to provide sufficient energy (via respiration) for muscle contraction. Skeletal muscle cells fuse together during development to form multinucleated cells that contract in unison.
What are the special features of a muscle cell?