What is the longest human body part?

The “longest” or “largest” human body parts can be described in terms of bones, muscles, organs, nerves, and blood vessels. Some key examples are:

• Longest Bone: The femur (thigh bone), located in the lower limbs, is the longest bone in the human body.
• Longest Muscle: The sartorius muscle, found in the anterior compartment of the thigh, is the longest muscle.
• Largest External Organ: The skin, which forms part of the integumentary system, is the largest external organ.
• Largest Internal Organ (by mass): The liver is the heaviest internal organ in the body.
• Longest Nerve: The sciatic (ischiadic) nerve, located in the lower limb (especially the thigh), is the longest and largest single nerve.
• Largest Artery and Vein: The aorta is the largest artery, while the inferior vena cava is the largest vein in the human circulatory system.