Question

What is the longest human body part?

Answer 1

Diverse physiological and anatomical systems dynamically interact and function to form the complex human body. It is organized at different levels, starting with the most basic parts, the cells, to the organ system level. Cells themself composed of molecules and both organic and inorganic compounds, and cells arrange to form various tissues (muscular, epithelial, nervous, and connective tissues). Tissues organize to form organs, and organs function together to form organ systems.

Complete answer:
The longest human body parts are mentioned in terms of any anatomical features such as organ, muscle, bone, and so on. Few are listed below,
The longest bone present in the human body is the femur or thigh bone, which is the proximal bone located in the lower limbs.
The sartorius is the longest muscle present in the anterior compartment of the thigh of a human body.
The largest external organ in the human body is the skin, which is part of the integumentary system.
By mass, the largest or heaviest internal organ present in humans is the liver.
The sciatic nerve or ischiadic nerve is the largest or longest single nerve present in the lower limb, more specifically the thigh.
The largest artery present in the circulatory system of the human body is the aorta, and the most prominent vein is the inferior vena cava.

Note:
The Human body with a higher degree of complexity comprises eleven organ systems that are organized and regulated through various mechanisms. They are cardiovascular, endocrine, lymphatic, nervous, muscular, integumentary, skeletal, reproductive, urinary, respiratory, and immune systems. The above-mentioned anatomical structures are part of these fundamental organ systems.