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Interaction Among Body Systems & Movement

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  • 0:04 Body Systems
  • 1:28 Full Cycle
  • 3:29 Nervous System & Movement
  • 5:35 Safety and Injury
  • 5:58 Lesson Summary
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Lesson Transcript
Instructor: John Hamilton

John has tutored algebra and SAT Prep and has a B.A. degree with a major in psychology and a minor in mathematics from Christopher Newport University.

In this lesson we discuss how body systems interact to create movement. We explain how the eleven body systems are indeed interdependent and interconnected and how they actually work together in unison.

Body Systems

Did you know the human body contains nearly 100 trillion cells and takes nearly 20,000 breaths each day? There are eleven body systems, and they all work together, not only to keep the human body alive, but also to produce movement. The three systems that mainly deal with human movement are the muscular, nervous, and skeletal systems, but actually all eleven systems do work together to coordinate body movements, and, in fact, keep the human body alive. This is because the human body's movements include not only the head and limbs, but also air and blood and a clear liquid called lymph. Moreover, either directly or indirectly, the systems all depend on one another. These are the eleven systems:

  • The circulatory system, which includes the heart and blood vessels
  • The digestive system, which breaks food into nutrients
  • The endocrine system, which deals with hormones
  • The integumentary system, which includes hair, nails, and skin
  • The lymphatic system, which moves and protects lymph nodes
  • The muscular system, which is the muscles
  • The nervous system, which involves brain, spinal cord, and nerves
  • The reproductive system, which creates new life
  • The respiratory system, or the lungs
  • The skeletal system, which involves bones and connective tissue
  • The urinary system, which removes liquid wastes

Human Anatomy
body

Full Cycle

Have you ever watched Star Trek and marveled at the bridge on the Starship Enterprise? That was the Central Command Center of the ship. Well, you can think of the nervous system as sort of the human body's control center. The brain sends orders through the spinal cord and then off along nerve fibers throughout the body. In turn, the muscular system receives the messages and enables the muscles to work by muscle contraction.

In the meantime, the skeletal system receives orders to give the body shape and support the brain, the body, and the internal organs. The respiratory system is told to use the lungs to send critical oxygen throughout the body in conjunction with the circulatory system, which transports nutrients via the blood. The lymphatic system, which is sometimes considered part of the circulatory system, uses a type of movement to distribute clear lymph throughout the body.

While all this is happening, the endocrine system is ordered to regulate all of the hormones and maintain crucial homeostasis, which is sort of the way Scottie from engineering keeps the USS Enterprise running and in balance. The integumentary system, which is composed of the hair, nails, and skin, does much more than look pretty; it actually helps protect the internal organs from damage, which is sort of how the shield system protects the Enterprise. It's also composed of the sweat glands, and stores fat and prevents dehydration. The digestive system is ordered to break down food, which can be absorbed; and finally, the urinary system removes waste from the body.

Starship Enterprise
Enterprise

We'd be remiss to discuss systems of the body without explaining the ever so important role of surrounding connective tissue. The organs of the body are comprised of tissue, which in turn is made up of even smaller cells. Ligaments connect bone to bone, and tendons connect muscle to bone. They are both comprised mostly of collagen. Since neither contains much flowing blood, if the ligament is sprained or the tendon is strained, the healing process may be slow. This combination of collagen, ligaments, and tendons work together to move the human limbs.

Nervous System & Movement

Many scientists argue that the nervous system is far and away the most important system in the body. This often brings heated debates with the point being made that each of the systems is, in its way, important, because they all work together and are basically codependent. After all, the body can only survive for about three minutes without air from the respiratory system and the lungs. The central nervous system is composed of the brain and the spinal cord, while the peripheral nervous system is composed of nerve fibers that branch off from the spinal cord. This is one major way the body systems interconnect, because these amazing nerve fibers literally extend to all parts of the body, including the muscular system and internal organs.

Nerve Cell
cell

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