Largest body part

Living animals

Blue whale

• Its tongue weighs around
• Its mouth is large enough to hold up to of food and water.
• Its heart typically weighs and can reach in exceptional cases
• Its aorta is about in diameter.
• The blue whale's penis typically measures.

  Other animals

• The giant and colossal squids have the largest recorded eyes of any living animal, with a maximum diameter of at least. Only the extinct ichthyosaurs are known to have had larger eyes.
• The giraffe has the longest neck of any land mammal.
• The north Pacific right whale has the largest testes of any mammal.
• The walrus has the largest baculum of any mammal.
• The wandering albatross has the largest wingspan at.
• The longest horns ever recorded belonged to a wild water buffalo and measured from tip to tip.
• The largest and heaviest brain belongs to the sperm whale, weighing around 9 kilograms.
• The Arctic lion's mane jellyfish may be the longest animal; the biggest had a bell with a diameter of and the tentacles reached. It was found washed up on the shore of Massachusetts Bay in 1870.
• Bootlace worms can reach great lengths. A specimen was measured at but this may be unreliable as the body is somewhat elastic.

  In proportion to body size

• The Morgan's sphinx hawk moth has the longest proboscis in relation to its body size. Its 25–30 cm proboscis is over 3 times longer than its body. It is also known as Darwin's moth because Charles Darwin predicted its existence some 40 years before it was discovered from experiments he did on an orchid with a "foot long" nectary.
• The tube-lipped nectar bat has the longest tongue of any mammal in relation to its body size. Its tongue is 1.5 times longer than its body, and must be kept inside its rib cage.
• The barnacle is the creature with the largest penis as a proportion of its body size.
• Among vertebrates, the Argentine blue-bill duck has the longest penis in relation to its body size.
• The vampire squid has the largest eyes of any animal relative to its size.
• The kiwi lays the largest egg of any bird relative to its size - up to a quarter of the mass of the female.
• Shrews have the largest brain-to-body mass ratio of any animal, with brains that are 10% of body weight. Humans however have the largest encephalization quotient of any animal.

  Humans

• The longest bone in the human body is the femur.
• The largest artery is the aorta and the largest vein is the inferior vena cava.
• The largest internal organ is the liver, with an average of.
• The largest external organ, which is also the largest organ in general, is the skin.
• The longest muscle is the sartorius muscle in the thigh.
• The longest single nerve is the sciatic nerve in the thigh, counting its branches and axons.

  Individual human records

• The person with the longest tongue is Nick Stoeberl of Salinas, California, United States, whose tongue measures.
• The woman with the longest legs is Svetlana Pankratova. At a height of, her legs measure.
• The woman with the longest fingernails is Lee Redmond. The total length of her fingernails is 7.513 meters.
• The longest head of hair belonged to Xie Qiuping of China and measured on 8 May 2004.
• The longest beard ever measured belonged to Hans Langseth of Norway; at his death in 1927 it was long.
• The longest ear hair belongs to Victor Anthony of India, measuring 18.1 centimetres.
• The largest feet belonged to Matthew McGrory. His left foot measured and he wore size 29 1/2 shoes.

  Extinct animals

• The animals with the longest necks, up to in some cases, were plesiosaurs and sauropod dinosaurs.