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Organelles of spesial value
Microvillies and flagellums meet at unicellular organisms (bacteria, elementary) and at cells in composition of tissues (cell of an epithelium of a trachea). The myofibrils are characteristic for muscle cells. The neurofibrils are an obligatory component of many nervous cells and their processes.
Figure 19.11 Eukariotic flagellum or cilium (fragment)
Figure 19.12 Flagellum (electronic micrograph)
Incorporations
Incorporations are changeable structural components of cells arising as a result of an endocellular metabolism or other processes of vital activity of cells. all incorporations are sectioned into three groups (trophic, secretory and spesial) in the function attitude.
The trophic incorporations reflect a metabolism of cells. They are separated by grains of a glycogen, albuminous beads, drops of fat.
The secretory incorporations are characteristic, in basically, for glandular cells (for example, pancreas and thyroid glands).
The spesial incorporations are present in highspecialize cells with protective function. To this group consist of grains of a pigment (melanin) in cytoplasm of melanocytes.
ORGANIZATIONAL STRUCTURE of the PRACTICAL STUDY
THEORETICAL QUESTIONS NECESSARY FOR ACHIEVING of the PRACTICAL CLASSES
1. Main components of cytoplasm. Classification of organelles.
2. Constitution and function ofcytoskeleton.
3. Constitution and function of a cell organelles.
4. Incorporations of cell. Classification and main kinds of incorporations.
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| Figure 19.8d Chloroplasts in the plant cell | | | INDEPENDENT WORK of the STUDENTS |