Which of the following cells last a lifetime and cannot be replaced once dead?
Cells of the eye lens
Muscle cells
Nerve cells
All of the above
Cells of the eye lens, nerve cells, nerve cells of the cerebral cortex and most muscle cells last a lifetime but once dead are not replaced.
Which cells are formed at the embryonic stage and once dead cannot be replaced?
Which of the following statements are true?
Single-celled organisms consist of many cells.
Nerve cell is the longest cell in human body.
Muscle cells are long and contractile to pull or squeeze the body parts.
The size of the organism is often related to the shape of the individual cells.