What are the components of the integrated system?
When people think of systems of vital organs, they think of internal systems such as circulation, respiratory or digestive system. The immune system can also come to mind, but there is another component of the body: an integrated system. This body system consists of parts that cover the outside of the body and act as the first defense line against foreign microorganisms. The ingredients of the integrated system are leather, hair and nails. In other animals, this system includes parts such as scales or fur, but people generally have only a light layer of body hair. It also protects the core of the body from sudden changes in temperature. The skin contains nerve endings that highlight the brain of feelings such as warmth, cold, pain and pressure. These nerve endings are more or less concentrated in different areas, causing the body parts are more sensitive to touch than others. Due to its additional function to maintain temperature, the skin is one of the most important components of the integrated system.
Most hair on humans grows from the scalp, although depending on the sex of a person, several other areas tend to have hair such as hair or armpits, chest, arms and legs. The main purpose of the hair hair is to provide insulation for the head against heat and cold. Eyebrows to catch sweat and avert it from the eye; This was vital for survival on the days of hunters of humanity collectors. Smaller hair, such as hair in the nostrils and ears, catches dust and other particles to prevent infection. The hair of the limbs is mainly used to maintain warm limbs, although there is a small amount of hair; The so -called "Goosebumps" occurs when the limb is cooled.
nails are the smallest components of the system and serve less purpose than hair and leather. Grow on the tips of the fingers and feet; Their main function is to provide support and method for gripping small objects that fingers cannot handle. In addition, nails contain sensory nerve endings,that complement the feeling of fingers; The dumbbells serve the same function for the toes on the feet. Because most people now wear shoes for most of the time, but this feature is not usually considered as important.
Other components of the integrated system include sweat glands and sebaceous glands. They create lubrication for skin and hair. In particular, sweat glands remove heat from the interior of the body by evaporation; The water has high specific heat and carries excess body heat.