THE CELLS Enrique Reina Gutiérrez nº 21

Daniel Casado Faulí nº 4

THE CELL STRUCTURE Plasma membrane

Mithocondrion

Cytoplasm

Ribosomes

Endoplasmic reticulum

Golgi Apparatus

Vacuoles

Cytoskeleton

Nucleus

Cytoplasm

• Cytoplasm: It’s the liquid solution inside the cell membrane that covers and form the cell’s parts excluding the nucleus.

RETURN TO CELL IMAGE

Plasma membrane

• Plasma membrane: It’s formed by a phospholipid bilayer that surrounds the cytoplasm. It functions as a selective barrier which separates the cell’s contents from its surroundings. It controls the exchange of materials such as nutrients and waste products between the two. The plasma membrane it’s partially permeable, this means that some small size particles can cross through it, bigger ones could only cross by an especial transport system.

Mithocondrion

• Mitochondrion:The mitochondrion is an organelle which it is surrounded by two membranes. It is the site for cellular respiration, the process by which the cell obtains energy .

Ribosomes

• Ribosomes: Ribosomes are tiny organelles found free in the cytoplasm or attached to the membranes of the endoplasmic reticulum. Ribosomes are made of RNA (ribonucleic acid) and proteins, and are the site for protein synthesis.

Endoplasmic reticulum

• Endoplasmic reticulum: It’s a series of sacs and membranous tubules that produce several substances such as lipids and proteins. the endoplasmic reticulum has ribosomes attached, it is called rough ER, and if not, smooth ER.

Golgi Apparatus

• Golgi apparatus: It is a series of flattened stacks of membrane-bound sacs, surrounded by small vesicles. Its function is to export to the outside of the cell (secretion) substances created in the ER.

Vacuoles

• Vacuoles: There are vesicles that contain water and other substances to store their waste products or other substances.

Nucleus

• Nucleus: It’s where all the genetic material (DNA) is, controls the cell and is covered by a small membrane.

Cytoskeleton

• Cytoskeleton: The cytoskeleton is a network of filaments that are located throughout the cytoplasm. It works as the ‘skeleton’ of the cell and it is involved in the movement of the cell.