Choose the odd one from each of the following:

Ureter, kidney, urinary bladder, urethra, lung.

Ureters:

1. The ureters are a pair of long tubes which extend from the kidneys.
2. They carry urine from the kidneys to the urinary bladder.
3. It is a part of the excretory system in the body.

Kidney:

1. The kidneys are a pair of bean-shaped, reddish-brown organs present in the abdominal cavity.
2. They help in the elimination of toxic waste from the body.
3. It is a part of the excretory system of the body.

Urinary bladder:

1. The urinary bladder is a bag like muscular organ located in the pelvic region.
2. It stores urine before it is expelled from the body.
3. It is a part of the excretory system of the body.

Urethra:

1. The urethra is the tube via which urine exits the body.
2. It is a part of the excretory system of the body.

Lungs:

1. Lungs are air-filled organs present in the thoracic cavity (chest).
2. They are a part of the respiratory system of the body.
3. They are the site of gaseous exchange (O₂ and CO₂) in the body.
4. Blood absorbs oxygen to deliver to different body parts from the lungs.

Final answer: Lungs are the odd one as it is a part of the respiratory system while others are organs of the excretory system.