Urban: His understanding is incredible, and he becomes an immortal starting from practicing martial

"Classmates, let’s study the motion system today"

"This is the focus of the final exam, so remember to take notes."

The teacher started his lecture after giving a reminder.

"The locomotor system is composed of three organs: bones, bone connections, and skeletal muscles. The bones are connected together in different forms to form the skeleton, which forms the basic shape of the human body and provides attachment for the muscles. Under the control of the nerves, the muscles contract and pull them. The attached bone uses the movable bone connection as the pivot to produce lever movement."

"The main function of the locomotor system is movement. Simple displacements and advanced activities such as language, writing, etc. are all realized by bones, bone connections and skeletal muscles. The second function of the motion system is to support"

"It constitutes the basic shape of the human body, including the head, neck, chest, abdomen, and limbs, and maintains body posture. The third function of the motion system is protection. Multiple body cavities are formed by bones, bone connections and skeletal muscles, including the cranial cavity, chest cavity, abdominal cavity and pelvic cavity, to protect the organs."

"From the perspective of movement, bones are the passive part, skeletal muscles are the dynamic part, and joints are the hubs of movement. Some bony protrusions or muscle bulges that can be seen or touched on the body surface are called body surface landmarks. They are of symbolic significance for locating organs, structures, etc. in the body"

"………"

Bai Xuan knew this part of the content, but listening to the teacher's explanation, Bai Xuan also gained a deeper understanding of the movement system.

"The human body is really mysterious"

"Although it seems that the human body structure is not perfect, it can even be said to be very fragile and has many flaws."

"But this is the human body, the body that allows humans to become the masters of this planet"

"Only such a body can allow the human brain to derive wisdom"

"Only wisdom is the only basis for mankind to conquer the planet"

"A heaven-defying understanding is a heaven-defying wisdom"

"When I train the spinal cord and brain to the extreme, it is equivalent to exercising almost all the organs and tissues of the human body to the extreme."

"But I understand that this is still not the limit of the human body"

"The human body is an extremely complex machine. Modern biology divides all the organs and tissues of the human body into eight systems, which are the eight major systems of the human body."

"Even if I train all the organs and tissues to the extreme, I still need to pay attention to the interaction between organs and organs, and between tissues and tissues."

"In the end, I must make certain adjustments to all the organs and tissues of the human body. Only in this way can I bring the eight major systems of the human body into full play and strengthen all the functions of the human body to the extreme."

【If you gain enlightenment through study and make certain optimization and adjustments to the extreme exercise method, you can make subtle adjustments to all the organs and tissues of the human body, thereby allowing the eight major systems of the human body to exert their effects to a greater extent, and go further. to strengthen various functions of the human body】

"very good."

While Bai Xuan was studying and thinking, the teacher also asked Bai Xuan questions as usual.

"Bai Xuan, please answer this question"

"What are the three main functions of the locomotor system?"

"good teacher"

"As the name suggests, the primary function of the movement system is movement. Human movements are very complex, including simple displacements and advanced activities such as language and writing, which are all achieved by muscle contraction under the control of the nervous system. Even a simple exercise often involves multiple muscles. Some muscles contract while others cooperate. Some muscles that are in an antagonistic position are even moderately relaxed and maintain a certain degree of tension at this time to make the movement smooth and accurate. , playing a complementary role"

"The second function of the locomotor system is support, which includes forming the human body, supporting body weight and internal organs, and maintaining body posture. The maintenance of human body posture is mainly maintained by the tension of muscles, in addition to the scaffolding function of bone-to-bone connection. Skeletal muscles are often in a state of involuntary tension, that is, the nervous system reflexively maintains a certain degree of tension. In a static posture, muscle groups that need to oppose each other maintain a certain degree of tension to achieve a dynamic balance."

"The third function of the motor system is protection. As we all know, the human trunk forms several body cavities. The cranial cavity protects and supports the brain and sensory organs; the thorax protects and supports important organs such as the heart, great blood vessels, and lungs; the abdominal cavity and pelvic cavity Protects and supports many organs of the digestive, urinary, and reproductive systems. These body cavities are connected by bones to form complete walls or most of the bony walls; muscles also form part of some body cavity walls, such as the anterior abdominal and lateral walls, the intercostal spaces of the thorax, etc., or surround the bony body cavity walls. , forming a protective layer with considerable elasticity and toughness. When impacted by external forces, the muscles reflexively contract, playing an important role in buffering blows and shocks."

Bai Xuan's voice is unhurried, methodical, full of magnetism, and extremely sweet, like a gentle spring breeze.

"Very perfect answer!"

After listening to Bai Xuan's reply with enjoyment, the teacher praised him with satisfaction.