Animal growth primarily occurs by an increase in the

A) number of tissues and organs.
B) number of cells.
C) types of cells produced.
D) number of cell functions.
E) number of cell shapes.

Tissue Growth

The process by which cellular divisions and expansions result in an increase in the size and number of cells in a tissue, contributing to the organism's growth.

Cell Shapes

The various morphological forms that cells can take, influenced by genetic and environmental factors.

Cell Functions

The various processes and activities that occur within a cell to maintain its life, including energy production, metabolism, replication, and response to external signals.