1. Breaks down food into nutrients.

2. Absorbs nutrients into the bloodstream. 3. Interacts with the circulatory system to distribute nutrients throughout the body.

1. Transports blood, oxygen, and nutrients.

2. Removes waste products from the body. 3. Interacts with the respiratory system to exchange gases in the lungs

1. Facilitates breathing and gas exchange.

2. Supplies oxygen to the blood and removes carbon dioxide.

3. Interacts with the circulatory system to oxygenate the blood.

1. Produces hormones that regulate body functions.

2. Controls growth, metabolism, and mood. 3. Interacts with the nervous system to maintain homeostasis.

2. Enables movement through muscles and bones.

3. Interacts with the nervous system to coordinate movement.

2. Processes sensory information.

3. Interacts with the endocrine system to regulate body functions.

1. Defends against pathogens and infections.

2. Produces antibodies and immune cells.

3. Interacts with the circulatory system to transport immune cells.

2. Facilitates fertilization and development of offspring.

3. Interacts with the endocrine system to regulate reproductive hormones