Cell

 Cell is structural and functional unit of living organism.

One after another cell rearranges and consists tissue, a group of tissue consists organ, a group of organ consists system and a group of system consists body. Hence, cell is called the building block of life.

It is a structural unit because it forms structure of living organs. It is called functional unit because it controls the physiological function of living organs like respiration and.energy production, immunity, reproduction, carrying the characteristics called inheritence and organs growth by cell cell division.

Cell is enclosed by cell membrane. Nucleus is in the centre of cell surrounded by cytoplasm. Cytoplasm including nucleus within cell membrane is protoplasm.

Cytoplasm consists with other organalae like, Mitochondria, ribosome, lysosome, endoplasmic reticulam, golgi body, centrosome,

The animal cell and plant cell is different. Plant cell consists with cell wall and plastid. chloroplast gives green color of leaf. 

During photosynthesis chloroplast is used as catalyst in plant cell. In different stage of photosynthesis role of chloroplast is visible. From releasing of oxygen and even the absorbing of carbon di oxide during calvin cycle of photosynthesis chloroplast have a vital role.

Animal Cell are two types

Prokaryotic cell： Unicellular animals are consists with prokaryotic cell. like Bacteria, Virus, Protozoa， Amoeba. These cells are not consists with structured nucleus.

Eukaryotic cell： Multicellular organs are Eukaryotic cell consists. These cell consists with structured nucleus.