Define the term Synapse. How are Cytons and Axons of neurons placed in the Cerebrum?

Name the three membranous coverings of the human brain.

A mature mammalian erythrocyte lacks nucleus and mitochondria but is efficient in its functioning. Explain by giving suitable reasons.

The diagram given below is that of a human brain. Answer the questions that follow :

(a) Label the parts numbered 2 and 3.

(b) State any one function of the part numbered 1.