Question

What are stem cells and it's types

Answer 1

An induced pluripotent stem cell, or iPS cell, is a cell taken from any tissue (usually skin or blood) from a child or adult and is genetically modified to behave like an embryonic stem cell. As the name implies, these cells arepluripotent, which means that they have the ability to form all adult cell types.
Embryonic stem cells - are harvested from the inner cell mass of the blastocyst seven to ten days after fertilization.

Fetal stem cells - are taken from the germline tissues that will make up the gonads of aborted fetuses.

Umbilical cord stem cells - Umbilical cord blood contains stem cells similar to those found in bone marrow.

Placenta derived stem cells - up to ten times as many stem cells can be harvested from a placenta as from cord blood.

Adult stem cells - Many adult tissues contain stem cells that can be isolated.

Answer 2

its a cell with unique ability to develop into specialised cell types in the body. in the future they may be used to replace cells and tissues that have been damaged or lost due to species.
Its types : adult stem cells :
types of adult cell types :
embryonic stem cells
induced pluripotent stem cells