Question

when you are racing in the hallway with your friend, what body systems are working for you? (check all that apply)
circulatory
digestive
endocrine
respiratory
immune
muscular
skeletal

Explanation:

When racing, the circulatory system pumps blood to deliver oxygen and nutrients to muscles. The endocrine system releases hormones like adrenaline to boost energy. The respiratory system takes in oxygen and expels carbon - dioxide. The immune system is always at work to protect the body. The muscular system is directly involved in movement, and the skeletal system provides support and structure for movement. The digestive system is not directly involved in the immediate act of racing.

Answer:

Circulatory
Endocrine
Respiratory
Immune
Muscular
Skeletal