What is the longest cell in the human body?

The longest cell in the human body is the nerve cell, also known as a neuron. Neurons are a part of the nervous system and can grow up to 3 feet long. These cells are responsible for transmitting information throughout the body and are unique to animals. Mast cells are a type of white blood cell involved in the immune system's response to allergies and inflammation. Bone cells, also known as osteocytes, are responsible for maintaining and repairing bone tissue. Muscle cells, also called myocytes, are responsible for movement in the body.