In exponential phase, maximum growth takes place.

Thymosin controls growth in childhood.

In accretionary growth, some cells of the tissues and organs of the body normally do not divide, but they perform specific functions of the body.

Body height is determined by epiphyseal or growth plate.

Growth curve is a sigmoid curve.

Restoration and renewal of damaged or lost part of the body is called regeneration.

An increase in the number and size of cells is called multiplicative growth.

Replacement of epidermal layer of skin is physiological regeneration

Auxetic growth is seen in nematodes, rotifers and tunicates.

Neoblasts are found in Planarians. They are undifferentiated reserve cells and help in regeneration

Blastema formation occurs in regeneration. It is the cellular aggregation from which new structures arise

Tail regeneration in ammocoete larva of Petromyzon is an example of Reparative regeneration

The size of embryo increases in pre-functional state of development

Epimorphosis is a kind of regeneration that makes the use of remainder piece of part to replace the lost part

The growth declines at senescent phase