lung
The main organ of respiration would be the two things you feel move in and out every time you breath, which if you haven't caught on yet, its you lungs silly :D
Lungs.
the main organ of the muscular system is the muscles
the heart is part of the circulatory system in the body.
The Heart is the main organ of a circulatory system.
Respiratory system
The organs that are not for respiration are as follows The intestance
The lungs conduct respiration.
The main organ in the muscular system is the muscles.
The main organ of the respiratory system is the lungs. They are responsible for the exchange of oxygen and carbon dioxide between the air and the bloodstream. The lungs facilitate breathing, allowing air to enter and exit the body, which is essential for maintaining cellular respiration and overall metabolism.
Yes the kidney is the main organ in the urinary system as well as the bladder.
The main organ of the blood transport system in a mammal is the heart.