Answer:
Brain organoids is the anatomical resemblance of the mammal brain. It is formed by culturing the stem cells in three dimensional rotational bioreactors. The main difference between the organoids and real brain is the real brain has the connection to outside world to mature in good manner.
The brain organoids are used to apply the genuine experimentation on the brain disorders. It helps in directly studying the tissues and neurons to study disease present in any patients.