Living things

1. Cell

A. History and Definition

Cell is the smallest unit of measure in living things. Cell is made of its organs which we call cell organelles . Cell was first discovered by Robert Hooke when he had invented the microscope and observed a cork's cell. He realized that the cork was made of many cells. 

After Hooke's discovery was made into a report . Matthias schleiden and Schwann discovered animals and plants cell.

After scientist's had observed many kind of cell . Nowadays , we can learn them very easily.

B. Organ of a Cell

Cells are made of 7 organs in common and some additions for plants and animal cell.

The common 8 organs  are:

1. Nucleus

The nucleus is the brain of the cell it controls everything that happens in the cell.

 The nucleus are made of :

A. Nucleoplasm

The liquid inside a nucleus

B. Nucleolus

Also called as little nucleus

C. Kromosome

A kind of very tiny string that contains genes

2. Sitoplasm

The liquid inside a cell, 

3.cell membrane

A membrane that covers the cell and in animal cells control th object that leave and enter a cell

4. Reticulum endoplasm

An organelle that produces protein with the help of rybosom

5.golgy body

An organelle that changes the packages sent by the reticulum endoplasm into other form of chemical.

6.mitocondria

A cell organelle uses in producing energy and respiration

7.vacuole

The main food supply of a cell . It is bigger on plant cells and smaller on animal cells.

2.Tissues

Tissues are a group of cell of the same function that work together to do bigger work.

There are many kind of tissues , you can read them on my future release post : TISSUES.

3. Organ

Organ are group of tissues that have different function and work together to do bigger jobs

4.organ system

Organ system are group of different organ that work together. A organ system work is bigger than organ.

5. At last the combination of many system organs will form living things