The ear
First of all, there are no organs outside the body, the human body is made of organs, and they are all contained in the body itself. The smallest organs that contain bones are the ears. There are three bones in the middle ear called ossicles, they are the malleus, incus, and stapes and they transmit sound waves from the ear drum, called the tympanic membrane, to the cochlear membrane. Sometimes these tiny bones are referred to as the hammer, anvil, and stirrup.
The main body cavities containing internal organs are the thoracic cavity (contains heart and lungs), abdominal cavity (contains digestive organs), and pelvic cavity (contains reproductive organs). These cavities protect and support the organs, and are lined by membranes called serous membranes.
The abdominal cavity contains major body organs such as the stomach, liver, intestines, and kidneys. This cavity is lined with a membrane called the peritoneum and is filled with a fluid called peritoneal fluid to help protect and cushion the organs.
Contains organs involved in internal fertilizayion
That would be the vascular system.
The hollow area of the chest is called the thoracic cavity, which contains the heart, lungs, and other vital organs.
Mullusks have a visceral mass that contains the gills, guts, and other organs.
there adaptation is that they have super sensing organs
The heart is an organ; it contains no other organs within it.
An organ that contains receptor cells is called a sensory organ. These organs perceive external stimuli such as light, sound, touch, taste, and smell and transmit this information to the brain for processing.
A plant or animal with the organs of both sexes is called a hermaphrodite.
The abdominopelvic cavity contains the organs of the urinary system.