Plants & humans both life forms are very close to its relationship:
Chlorophyll molecules of green plants bear an intriguing similarity to Haemoglobin
Green plants act as respiratory apparatus or the lung of the earth.They produce oxygen and consume carbon dioxide, thus making condition favourable for the existence of mankind and all other forms of life. The similarity of plants and organs, the doctrine of signature is one of the first and most significant works of our time show how closely connected the liberal arts are to the clinical medicine.
A sliced carrot looks like the human eye, the pupils, iris and radiating lines just like the human eye. We all know about carrot's use for the eye.
A walnut looks like a little brain. Even the wrinkles or folds on the nut are just like neocortex of the brain. It is essential for normal neurological functioning.
5. Kidney Beans
Kidney beans actually heal and help in maintaining the kidney function.
6. Avocados and Pears
Avocados look like a uterus and are related to the normal function of uterus and cervix of a female. When a woman eats one avocado a week, it balances hormones, sheds unwanted birth weight and prevents cervical cancer. Also, a striking similarity is that it takes exactly nine months to grow an avocado from blossom to a ripened fruit.
8. Sweet Potato
Sweet potatoes look like the pancreas and actually balance the glycemic index of diabetics.
10. Citrus fruits
Grapefruits, Oranges and other citrus fruits look just like the mammary glands of the female and actually improve the health of breasts and it's lymphatic circulation.
Onion looks like body cells. Today's research shows that onion helps to clear waste material from all of the body cells. They even produce tears which wash the epithelial layer of the eyes.