Across
- 3. The skeletal system is divided into two main sections: the ______ and appendicular skeletons.
- 5. the _________ system is made up of the brain, spinal cord, and nerves.
Down
- 1. the circulatory system is also known as the _____________ system.
- 2. a fluid that carries oxygen, nutrients, hormones and waste products through the body.
- 3. the immune system is made up of two subsystems: innate and _______.
- 4. your digestive system is a group of organs that work together to ______ and absorb nutrients from the food you eat.