The human body is very complex. It is like a job. You have to do a million things in one day to make it through the day. The body uses nine systems to do all of those jobs. They all have separate functions, but some work together. Each system is also made up of organs. There are many ways to care and protect the systems from the many different problems they can have. There are also many interesting facts about each system.
The nervous system’s main function is to coordinate all of the activities in the body. The main organs are the cerebellum, which controls and coordinates movement. The cerebrum, is the center for conscious thought, learning, and memory. The last main organ is the brain stem. The brain stem keeps the automatic systems in your body working. Problems of the nervous system include, epilepsy, Alzheimer’s, and multiple sclerosis. You can care for your nervous system by wearing a seatbelt, wearing a helmet, and by not using drugs or alcohol. Something very confusing about the nervous system is that the left side of human brain controls the right side of the body and the right side of the brain controls the left side of the body!
The skin has 3 main function. It has to regulate body temperature, remove waste (perspiration), and protect. The skin is made up of 3 layers. The epidermis is the outer thinner layer of the skin that is made up of dead and living cells. The dermis is the thicker middle layer of the skin that contains blood vessels and nerves. Sweat glands are found in the dermis, they secrete perspiration through ducts to pores on the skin’s surface. To avoid problems like warts, boils, moles, acne, and sunburn you can wash your body daily, wear sunscreen that is 15 or higher, and check your body often for unusual changes. If you didn’t have your skin you would die!
When you sit perfectly still, there are muscles throughout your body that are constantly moving. The muscular system is a group of tough tissues that make up the body parts move and help in maintaining posture. The main organs are tendons, smooth muscles, skeletal muscles, and cardiac muscles. Tendons are tough tissues that connect muscle to bone. Smooth muscles are found in different places throughout the body. You do not control these. They help in digestion. Skeletal muscles are attached to bones. They work with the bones of the skeleton to allow you to move. It is voluntary so you control it. Lastly is the cardiac muscles. They are found only in the walls of the heart. It is controlled by the brain and in involuntary. They help by pumping blood everywhere in your body. Some problems are, a bruise, a hernia, and muscular dystrophy. You can care for your muscular system by doing regular physical activity, have good posture, and don’t forget RICE. Rest, Ice, Compress, and Elevate.
The three main functions of the skeletal system are to provide framework, give support, and protect organs. A joint is where two bones meet. A ligament is a strong...