Question

Fish breathe through their
2. The
controls all the other system of our body.
3. Our brain weight has about
ke​

Answer 1

Fish breath through their gills
The brain controls all the other system of our body
The brain weighs abt 1.5kg

Answer 2

Here is your answer...

1. Fish breathe with their gills, and they need a constant supply of oxygen. Gills sit under the operculum.

2.Nervous system coordinates the activities of our body. It controls all our behaviour, thinking and actions. It is through nervous system only that all other systems of our body work. It passes information from one internal system to another. For example, when we put food in mouth, it causes release of saliva from the salivary glands.

3.In terms of weight, the average adult human brain weighs in at 1300 to 1400 grams or around 3 pounds.

In terms of length, the average brain is around 15 centimeters long.

For comparison, a newborn human baby's brain weighs approximately 350 to 400 grams or three-quarters of a pound.

Men tend to have bigger brains than women.