Description:
A body system is the term used to describe parts of the body that work together and collectively fulfil a function. Humans have many different body systems - four of them are shown here. The lymphatic and immune systems help protect the body from disease and infection; the respiratory system allows us to breathe; the urinary system gets rid of unwanted waste products after digestion has occurred; and the endocrine system helps to regulate the condition of the body by using hormones.