m2 Flashcards
he examined the corks of plants and observed tiny boxes which described as like the rooms in monastery and called them “cell”.
Robert Hooke in 1665
In the study of the cell, which is the science of cytology, the cell is known for having 3 Main Parts,
(1) Cell Membrane, (2) Cytoplasm, and (3) Nucleus.
is the envelope of the cell which gives shape, and serves as a covering and protective agent of the cell. It is a semi-permeable membrane that controls the molecules that may go into and out of the cell. In addition to the cell membrane, plants cell have cell wall that gives support and strength.
cell membrane
is the intracellular environment which contains the organelles
cytoplasm
which are tiny structures responsible in performing important metabolic activities
organelles
These organelles are the:
Centrioles in centrosomes Chloroplast Endoplasmic reticulum Golgi complex Lysosomes Mitochondria Ribosomes Vacuoles
are for the formation of spindle fibers which are essential in cell division. These are present only in animal cells.
Centrioles in centrosomes
present only in plants. This contains the green pigment, called chlorophyll, essential in the process of photosynthesis.
Chloroplast
which is considered as the “circulatory system of the cell”, which is of two(2) types, these are the rough ER (rER) and smooth ER (sER). The rough ER is lined with ribosomes, so that it is for the distribution of proteins, while the smooth ER is for the transportation of other materials, such as carbohydrates and lipids.
Endoplasmic reticulum
known as the packaging plant and secretory vesicle of the cell. It collects materials from the different organelles and disposed them off via secretory vesicles which are formed at the cell membrane.
golgi complex
are known as the “suicide sacs” that secrete lysozymes for digestion.
lysosomes
the “powerhouse of the cell”, because it is responsible in the production of Adenosine Triphosphate (ATP), as the energy source.
mitochondria
are spherical bodies for protein synthesis.
ribosomes
for the storage of materials.
vacuoles
-Usually at the center of the cell is a more or less rounded structure
-considered as the “brain of the cell”
nucleus