Answer:

The excretory system is important because it helps the body eliminate metabolic waste, maintain a balance of salt and water, and control blood...

Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.

The nervous system plays a role in nearly every aspect of our health and well-being. It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and feeling emotions. The nervous system controls: Brain growth and development.

Your respiratory system is the network of organs and tissues that help you breathe. This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood. Common problems include allergies, diseases or infections.

Explanation:

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Answer:

Importance of the excretory system:

The excretory system functions as a system that eliminates various types of waste products from the body. This system keeps our body clean and healthy. If the body was unable to eliminate products, these harmful chemicals would stay and the health of the body would suffer greatly. Also, the other organ systems would not function if this system does not do its job. This system allows the body to function and survive.

Importance of the digestive system:

In the digestion of food, nutrients are broken down into simple forms and released for absorption by the cells of the body. This entire process is made possible by the digestive system. The importance of the digestive system involves the conversion of nutrients into a form that can be used by the body as well as nutrition absorption. The digestive system affects so much of the rest of the body because all body systems need nourishment to function. Diseases and conditions of the digestive tract can have far-reaching implications for the rest of the body if nutrients aren't being absorbed properly.

Importance of the nervous system:

The human nervous system is of great importance as it is responsible for receiving and transmitting information about the body and the environment that surrounds it. The nervous system produces responses taking into account the stimuli received. The stimuli received by the sensory structures are stored in the nervous system, where they are integrated with the information transmitted by other stimuli. The nervous system is in some way the head of the human body since it is in charge of coordinating and controlling the functions of this. Any action performed by a body structure depends on the nervous system to be effective.

Importance of the respiratory system:  

The respiratory system is responsible for the exchange of carbon dioxide and oxygen in the human body. The respiratory system is vital to the whole functioning of the body. This system is essential in bringing in the oxygen required by every aspect of the body, from oxygen the cells need to function and replace cells that have died to the oxygen the muscles need. It also removes harmful gases such as carbon dioxide from the body.  This system also helps remove metabolic waste and keep pH levels in check.