living things are made up of cells.
are the smallest working units of all living things.
cells come from preexisting cells through cell division.
The study of cells from its basic structure to
the functions of every cell organelle is called Cell Biology. Robert Hooke was
the first Biologist who discovered cells.
A cell is
defined as the smallest, basic unit of life that is responsible for all of
Provide structure and support to the body of an
The cell interior is organised into different
individual organelles surrounded by a separate membrane.
The nucleus (major organelle) holds genetic
information necessary for reproduction and cell growth.
Every cell has one nucleus and membrane-bound
organelles in the cytoplasm.
Mitochondria, a double membrane-bound organelle is
mainly responsible for the energy transactions vital for the survival of the
Lysosomes digest unwanted materials in the cell.
Endoplasmic reticulum plays a significant role in
the internal organisation of the cell by synthesising selective molecules and
processing, directing and sorting them to their appropriate locations.
Types of Cells
(no nucleus) 2. Eukaryotic (contains a nucleus)