That's the brain. It runs everything else.
Brain
the hardest working horse is a appolosa. the hardest working muscle in your body is the heart. it pumps loads of blood through your body every second!
heart
organ is considered the hardest instrument to play because your whole body is working, also they are not so common, you usually find them in churches
These organs working together make an organ system.
The colon is an organ. An organ is defined as a collection of different tissues working together for a body function.
Many cells working for the same function=a tissue Many tissues working for the same function= an organ Organs working for the same function= an organ system Organ systems working for the same function= you
The heart
A organ systemOrgan system working together is called organism.a body is made up of diff. organ systeman organism
A disease is when you have a body malfunction or an organ is not working right.
An organ is made up of different tissues working together to preform a body function.
left ventricle as it pumps blood to all parts of the body..
The strongest organ of the body is the heart.