Complete the following paragraph in order to demonstrate your understanding of they body and the systems that work together.

Each of your body systems relies on the others to work well.

Your (Respiratory or Neurological) system relies on your circulatory system to deliver the (Carbon Dioxide or Oxygen) it gathers.
The muscle of your heart cannot function without the oxygen they receive from your lungs. The (Muscles or Bones) of your skull and spine protect your brain and spinal cord.
The (Nervous or Circulatory) system provides your brain with a constant supply of oxygen-rich blood while your brain regulates your heart rate and blood pressure.
Working together, these systems maintain stability and balance, otherwise known as homeostasis.
(Disease or Nutrients) in one body system can disrupt homeostasis and ‘cause trouble in other body systems.

Choose which fits the sentence.

Your respiratory system relies on your circulatory system to deliver the oxygen it gathers.

The muscles of your heart cannot function without the oxygen they receive from your lungs. The bones of your skull and spine protect your brain and spinal cord.
The circulatory system provides your brain with a constant supply of oxygen-rich blood while your brain regulates your heart rate and blood pressure.
Working together, these systems maintain stability and balance, otherwise known as homeostasis.
Disease in one body system can disrupt homeostasis and ‘cause trouble in other body systems.

The correct choices to fit the sentence are as follows:

- Respiratory system relies on your circulatory system to deliver the Oxygen it gathers.
- The muscle of your heart cannot function without the oxygen they receive from your lungs.
- The Bones of your skull and spine protect your brain and spinal cord.
- The Nervous system provides your brain with a constant supply of oxygen-rich blood while your brain regulates your heart rate and blood pressure.
- Disease in one body system can disrupt homeostasis and 'cause trouble in other body systems.

The word that fits the sentence is "Disease."