Top 10: What are the heaviest organs in the human body?

Just think about how much of your mass is made up from the vital bits of your body - find out what the heaviest organs in the human body are and what they do.

17th November 2015

1. Skin

Skin (iStock)

Average weight: 4,535g

Function: Protects against pathogens; provides insulation; synthesizes vitamin D; regulates temperature; provides sensation

2. Liver

Liver (iStock)

Average weight: 1,560g

Function: Breaks down toxins; produces hormones, proteins and digestive biochemicals; regulates glycogen storage

3. Brain

Brain (iStock)

Average weight: 1,500g

Function: Drives executive functions such as reasoning; coordinates responses to changes in environment

4. Lungs

Lungs (iStock)

Average weight: 1,300g

Function: Supplies oxygen to be distributed around the body; expels carbon dioxide that is created around the body

5. Heart

Heart (iStock)

Average weight: 300g

Function: Pumps oxygenated blood from lungs around the body; pumps deoxygenated blood to the lungs

6. Kidneys

Kidneys (iStock)

Average weight: 260g (pair)

Function: Remove waste products; regulate sodium and water retention; filter blood; produce urine and hormones

7. Spleen

Spleen (iStock)

Average weight: 175g

Function: Filters blood; holds a reserve supply of blood; recycles iron; synthesizes antibodies; removes bacteria

8. Pancreas

Pancreas (iStock)

Average weight: 70g

Function: Produces insulin and glycogen; secretes enzymes that assist in the absorption of nutrients in the small intestine

9. Thyroid

Thyroid (iStock)

Average weight: 20g

Function: Controls body’s energy use; makes proteins; controls hormone sensitivity

10. Prostate gland

Prostate gland (iStock)

Average weight: 11g

Function: Secretes an alkaline fluid that constitutes 50-75 per cent of the volume of semen


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