• Cytoplasm: It’s the liquid solution inside the cell membrane that
covers and form the cell’s parts excluding the nucleus.
• 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.
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 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: 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: 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: There are vesicles that contain water and other substances
to store their waste products or other substances.
• Nucleus: It’s where all the genetic material (DNA) is, controls the cell
and is covered by a small membrane.
• 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.
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