Noun change

Singular
internal organ

Plural
internal organs

  1. An internal organ is an organ of an animal that is inside the body, beneath the skin.
    The stomach, heart, lungs, and liver are internal organs and are protected by layers of skin, fat and bones.


Parts of the body (edit)
head ears - eyes - eyebrow - nose - mouth - lips - tongue - tooth (pl. teeth) - cheeks - chin
torso neck - throat - shoulders - chest - breasts - ribs - abdomen - pelvis - back
internal organs heart - lungs - liver - stomach - kidneys - intestines - bladder - ovaries - uterus/womb
extremities arms - hands - fingers - legs - feet - toes
sex organs penis - vagina - testicle - ovary - vulva