1-Why do the bones connect to each other at the joints? Because it facilitates bending and movement, like the elbow joint.
2- Why is a tube that connects the throat and the lungs? Because in the urban area it is divided into two airways, one of which is connected to the right lung, and the other to the left lung.
3- why the heart its importance? The heart is at the center of your circulatory system, which is a network of blood vessels that delivers blood to every part of your body. Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly.