what is the main organs of the integumentary system
Integumentary system The skin is the largest organ in the body. In humans, it accounts for about 12 to 15 percent of total body weight and covers 1.5-2m2 of surface area.[4]
Respiratory system In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract. The tract is divided into an upper and a lower respiratory tract. The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds. The lower tract (Fig.Â 2.) includes the lower part of the larynx, the trachea, bronchi, bronchioles and the alveoli.