Question

The face is the index of the brain

Answer 1

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These tumors tend to spread through the cerebrospinal fluid (CSF) to other parts of the brain and spinal cord. Medulloblastoma and other CNS embryonal tumors may be malignant (cancer) or benign (not cancer). Most of the tumors in children are malignant.

Answer 2

Mitochondria may have a number of different shapes.[23] A mitochondrion contains outer and inner membranes composed of phospholipid bilayers and proteins.[17] The two membranes have different properties. Because of this double-membraned organization, there are five distinct parts to a mitochondrion:

the outer mitochondrial membrane,

the intermembrane space (the space between the outer and inner membranes),

the inner mitochondrial membrane,

the cristae space (formed by infoldings of the inner membrane), and

the matrix (space within the inner membrane).

Mitochondria stripped of their outer membrane are called mitoplasts.