Human muscle anatomy, or what determines the strength of a person

Human muscle anatomy, or what determines the strength of a person

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The muscular system is the foundation of physical health. Human muscle anatomy is represented by more than 600 different fibers, which make up 47% of the total body weight. Not only the movement of the body in space depends on their functionality, but also many physiological processes: swallowing, blood circulation, chewing, metabolism, heart contractions, etc. various physical activities and perform most of the work. Therefore, a detailed study of the structure of muscles, their classification and functionality is considered one of the key sections of anatomy.

Detailed structure of muscle tissue

Each muscle taken separately is an integral organ, consisting of many small muscle fibers – myocytes, as well as dense and loose connective tissue in different proportions. There are 2 functional zones in it: the abdomen and the tendon. The abdomen performs mainly a contractile function, therefore it is represented by a combination of connective tissue substance and myocytes, capable of contraction and excitation. The tendon is considered the passive part of the muscle. It is located at the edges and consists of dense connective tissue, thanks to which fibers attach to bones and joints.

Innervation and blood supply to each muscle is carried out due to the thinnest capillaries and nerve fibers located between bundles of 10-50 myocytes. Thanks to this, muscle tissue receives the necessary nutrition, is supplied with oxygen and nutrients, and can also contract in response to an impulse transmitted by the nerve tissue.

muscles, running

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Tissues: Anatomy, Structural Features and Functions Performed

Tissues: Anatomy, Structural Features and Functions Performed

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the human body contains more than two hundred different types of cells, each of which is unique. Dividing them into groups called tissues allows a similar structure and origin, as well as the functions performed. Tissues are the next hierarchical level of human anatomy after cells. They are a symbiosis of cells and intercellular space, the structure of which allows them to perform the functions assigned to them, thereby supporting the normal vital activity of the body.

In humans, 4 types of tissues are distinguished: epithelial, connective, muscle and nervous. Each of them is formed as a result of cell differentiation during the formation of the organism. What are the features of tissue anatomy, how do they interact and what functions do they perform? Anatomical reference will help you understand these issues!

Human tissue anatomy: from homogeneous cells to a highly differentiated organism

Formation of tissues, maintaining their shape and performing general functions is a complex process programmed in the body by DNA molecules. It is thanks to genetic information that cells are capable of differentiation – a biochemical process, as a result of which initially homogeneous units acquire specific features that subsequently allow them to perform certain functions. Thanks to this process, 4 types of tissues with similar anatomy and physiology appear in the body.

It is noteworthy that after differentiation, tissue cells retain their inherent features even in a new environment. To prove this, in 1952, experts at the University of Chicago carried out a visual study by dividing the cells of a chicken embryo and cultivating them in special enzymes. As a result of this experience, new colonies were formed, but at the same time the reactions and “behavior” of cells in the new structural environment were typical for the particular type of tissue from which they originally originated.

To understand how cells interact in the human body, consider the tissue anatomy in more detail.

Epithelium