Animal cells

Teacher:
Division: 8B2
Animal Cell
Animal Cell's Functions
Nucleus
The nucleus is the most obvious organelle in any eukaryotic cell. It is surrounded by a double partially
permeable membrane. The nucleus, orders the rest of the organelles what type of products they should make
and when to make them. It communicates within its surroundings through via numerous nuclear pores.
Within the nucleus the chromosomes are the ones in charged to keep the inherited information. It also contains
the DNA: the DNA is similar in every cell of the body, but depending on the specific cell type. All cells
contain much more DNA than they actually use. A small percentage of this DNA is active, and the rest of it is
outdated (or nonsense DNA) that the organism no longer uses.
Nucleolus:
The NUCLEOLUS manufactures RIBOSOMES, structures in which proteins are assembled.
Endoplasmic Reticulum:
The ER membrane is a continuation of the outer nuclear membrane and its function suggests just how
complex and organized the eukaryotic cell really is.
The ER stretches from the nuclear membrane to the plasma membrane. It serves as a pathway through the
cytoplasm, as a support structure for the attachment of other organelles, and as a workstation for the
ribosomes.
Golgi Apparatus:
The Golgi apparatus is a membrane−bound structure with a single membrane. It is actually a stack of
membrane−bound vesicles that are important in packaging macromolecules for transport elsewhere in the cell.
The stack of larger vesicles is surrounded by numerous smaller vesicles containing those packaged
macromolecules (it sort of gives the final touches).
Mitochondria:
Eukaryotic cells have a special organelle called the mitochondrion that converts energy into food (aerobic
respiration).
Vacuole:
The vacuole contains the cell's food, water and waste products. It is usually large in animal cells.
Cell Membrane:
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The cell surface membrane is made up of fat and proteins. It controls what goes in and out (partially
permeable), it holds the cell together.
Cytoplasm:
The cytoplasm is a jelly−like substance, with 70% water, where all the organelles take place.
Ribosomes:
They are the ones that build proteins; they are manufactured by the nucleolus. The ribosomes consist of two
separate subunits: a large, lower subunit and a small, upper subunit. Ribosomes attach to the rough ER .
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