Read the given passage and answer the following questions - 

The human body is an incredible structure made of many parts, each with a unique role. Think of it as a complex machine where everything is connected. At the core of our body, we have bones that form the skeleton. This isn't just a structure; it's our body's framework, giving us shape and protecting important organs.

Around these bones are muscles. Muscles are like the body's engine. They contract and stretch to move our bones, so we can walk, jump, or even just pick up a cup of coffee.

Then there's the heart, a pump that works tirelessly. It sends blood all around the body. This blood carries oxygen and nutrients to every corner, keeping us alive and well.

Our body also has a superhighway of nerves that sends messages faster than you can blink. This network lets your brain talk to different parts of your body, telling your muscles to move or your heart to beat faster when you're excited.

All these parts together make up the incredible system that is the human body, working 24/7 to keep us going.