The cells in the human body

1. Composed of 2 or more cells. Cells are grouped to form different levels of organisation.
2. The cell

   Annotations:

   • Is the smallest unit of life because it performs the three vital functions.
   1. Tissue
      1. Organ
         1. System
            1. Several organs that perform a function together.
         2. A set of tissues that are grouped and perform the same function.
      2. A set of one tipes of cells wich performs the same function.
   2. The first level of organisation.

      Annotations:

      • They have different shapes acording to their function.
      1. Types of cells
         1. Muscle cells
         2. Nerve cells /Neurons
         3. Epithelial cells

Annotations:

• It´s going to be about the cells in the human body, pay attention!!!