Energy is not delivered by any body system.
blood delivers oxygen to the cells
The circulatory system, which includes the heart, blood vessels, and blood, delivers oxygen and nutrients to muscles and organs throughout the body. The heart pumps oxygen-rich blood to tissues and organs, while the blood vessels transport nutrients and oxygen to cells and remove waste products.
The endocrine system
The muscular system is responsible for converting energy from food into movement and physical activity. Muscles contract and relax to generate force and produce movement in the body.
"circulatory"
From what i can gather, the digestive system provides the circulatory system with all the nutrients the blood and body need. The digestive system provides the body with energy from food and that energy feeds the muscles surrounding the heart.
Muscles.
The circulatory system, specifically the cardiovascular system, is responsible for delivering nutrients to cells throughout the body. This system uses blood vessels, such as arteries and capillaries, to transport oxygen and nutrients to cells and remove waste products.
Circulatory System
The muscular system is responsible for creating the force that allows the body to move. Muscles contract and generate the necessary mechanical energy for movement.
All the muscles that move your body are referred to as skeletal muscles, and these include the muscles of the back and buttocks. They all belong to the muscular system, sometimes referred to as the musculoskeletal system.
The respiratory system and the cardiovascular system are used when breathing hard during a jog. The respiratory system delivers oxygen to the muscles, while the cardiovascular system transports the oxygenated blood to the working muscles and removes waste products.