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

"Students, we are here today to learn about the movement system. "

"That's the focus of the final exam, so remember to take good notes. "

After a reminder, the instructor began his lecture.

"The locomotor system is composed of three organs: bone, bony junction and skeletal muscle, bones are connected together in different forms to form bones, forming the basic form of the human body, and providing attachment for muscles. "

"The main function of the locomotor system is movement. Simple displacement and advanced activities such as speech and writing are achieved by bones, bony junctions, and skeletal muscles. The second function of the motion system is support. "

"Constitute the basic form of the human body, head, neck, chest, abdomen, limbs, and maintain posture. The third function of the locomotion system is protection. Multiple body cavities, cranial, thoracic, abdominal and pelvic cavities are formed by bones, bony junctions and skeletal muscles to protect organs. "

"From the perspective of movement, the bone is the passive part, the skeletal muscle is the dynamic part, and the joint is the hub of movement. Some bony protrusions or muscle bulges that can be seen or felt on the surface of the body are called body surface landmarks. They are symbolic for locating organs, structures, etc. in the body. "

“........."

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

"The human body is really mysterious. "

"Although it seems that the structure of the human body is not perfect, it can even be said to be very fragile, with many defects. "

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

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

"Only wisdom is the only way for mankind to conquer the planet. "

"Wisdom against the sky is wisdom against the sky. "

"When I exercise the spinal cord and cerebral cord to the extreme, it is equivalent to I have exercised almost all the organs and tissues of the human body to the extreme. "

"It's just that I understand that this is still not the limit of the human body. "

"The human body is an incomparably complex machine, and modern biology divides all organs and tissues of the human body into eight systems, that is, the eight major systems of the human body. "

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

"In the end, I will have to make certain adjustments to all the organs and tissues of the human body, only in this way can I perfectly exert their functions of the eight major systems of the human body and strengthen all the functions of the human body to the extreme. "

[Through learning and understanding, you can optimize and adjust the extreme body forging method to a certain extent, and you can make subtle adjustments to all organs and tissues of the human body, so as to give full play to the effects of the eight major systems of the human body to a greater extent, and further strengthen the functions of the human body. 】

"Good. "

It was also when Bai Xuan was studying and thinking at the same time.

The instructor also asked Bai Xuan a question as usual.

"Bai Xuan, you can answer this question. "

"What are the three main functions of the locomotion system. "

"Good teacher. "

"The locomotion system, as the name suggests, has the primary function of movement. Human movement is very complex, including simple displacement and advanced activities such as speech and writing, all of which are achieved by muscle contraction under the control of the nervous system. Even a simple exercise often involves multiple muscles, some muscles contract, while others work together, or even some antagonistic muscles are moderately relaxed and maintain a certain degree of tension at this time, so that the movement is smooth and accurate, and plays a complementary role. "

"The second function of the locomotor system is support, which includes composing the body shape, supporting body weight and internal organs, and maintaining posture. The maintenance of human posture mainly depends on the tension of the muscles, in addition to the scaffold effect of bone and bone connection. Skeletal muscles are often in an involuntary state of tension, that is, the nervous system reflexively maintains a certain level of tension, and in the stationary position, the muscles that need to oppose each other maintain a certain level of tension to achieve a dynamic balance. "

"The third function of the locomotor system is protection, as we all know, the human torso forms several body cavities, the cranial cavity protects and supports the cerebral medullary cord and sensory organs, the thoracic cavity protects and supports the heart, large blood vessels, lungs and other important organs, and the abdominal cavity and pelvic cavity protect and support many organs of the digestive, urinary and reproductive systems. These body cavities are made up of bone and bone connections to form a complete wall or most of the bony wall, and muscles also form part of some body cavity walls, such as the anterior and lateral abdominal walls, the intercostal space of the thoracic cage, etc., or surround the bony body cavity wall, forming a protective layer with elasticity and toughness, and when impacted by external force, the muscles reflexively contract, playing an important role in cushioning blows and shocks. "

Bai Xuan's voice was unhurried, methodical, full of magnetism, incomparably pleasant, like a gentle spring breeze.

"A perfect answer!".

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