Collaborative presentation on the cell

1. Enjoy the STEAM
PROJECT e TWINNING
collaborative presentation on the cell

2. The cell

3. Cells represent the smallest part of living matter in an organism
All cells have:
1. the cell membrane
2. the cytoplasm
3. the nucleus

4. The cell membrane
It is a thin coating that surrounds the cell.
It regulates the exchanges between the cell and the external environment,
selecting the nutrients that must enter the cell and allowing those of waste to exit.

5. The cytoplasm
The cytoplasm constitutes the cellular mass enclosed by the membrane. It has a
gelatinous consistency and is composed of water, mineral salts and organic
substances. It contains the organelles used for the various cellular functions.
The mitochondrion
it is the organelle that supplies energy both in animal cells and in vegetable cells.
Through the process called cellular respiration, mitochondria produce ATP
molecules that provide energy for all cellular activities.

6. Ribosomes
Ribosomes have the fundamental function of synthesizing proteins. Outside the
nucleus, ribosomes can move freely within the cytoplasm or anchor to the
endoplasmic reticulum.

7. The vacuoles
The vacuoles are organelles similar to small round vesicles containing water,
reserve nutrients and waste substances destined to be expelled from the cell.

8. Lysosomes
Lysosomes have the function of scavengers because they collect the damaged or
worn parts of the cell. They contain enzymes that can degrade these cellular
debris.

9. The Golgi apparatus
The Golgi apparatus is a collection of membranes, bladders and vacuoles
that allows the substances necessary for the rest of the organism to be
transported outside the cell.

10. The nucleus
The nucleus is the control organ of the cell, directs all activities and provides for its
reproduction. We can distinguish:
1. the nuclear membrane
2. the nucleoli
3. chromatin

11. The cytoskeleton
the cell maintains its shape thanks to the cytoskeleton that consists of capillary
microfilaments formed by proteins and microtubules that are thin hollow tubes.