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Authoritative PPT Summary
"Structural Hierarchy of Animal Body" How cells constitute living organisms PPT courseware 2
Think about it, discuss it
The processes represented by the ellipsis in the figure are roughly cell division, growth and differentiation. In this process, in addition to the increase in the number of cells, a series of complex changes also occur: dividing cells need to grow, cell differentiation occurs during the cell growth process, and cell differentiation produces different cell groups, forming Various types of tissues constitute various types of organs, such as gills, heart, etc.; different organs constitute systems, such as fish's respiratory system, circulatory system, digestive system, etc.
By studying this section, you will know:
1. How are the various cells in multicellular organisms formed?
2. What are the basic tissues of the human body?
3. What are the structural levels of the human body?
1. Cell differentiation to form different tissues
1. Cell differentiation: During the process of individual development, the offspring produced by one or a kind of cell through division undergo differential changes in shape, structure and physiological function.
2. Tissue: A group of cells formed by cells with similar shapes, structures, and functions united together.
3. The relationship between cell division, cell growth and cell differentiation
Multicellular organisms increase the number of cells through cell division. After cell growth and differentiation, a variety of cells in the organism are formed, and these cells further form various tissues.
2. Tissues further form organs
Organ: A structure composed of different tissues that are combined in a certain order to perform certain functions.
3. Organ system and human body
1. System: Multiple organs that can jointly complete one or several physiological functions are combined in a certain order.
2. The human body is a unified whole composed of eight major systems.
Class exercises
1. Tissues are formed by many __________ similar, ________, ________ identical cells united together. Different __________ are united in a certain order to form structures with certain functions called organs. The system is composed of multiple organs that can jointly complete ____________ physiological functions and are composed according to a certain __________.
2. The human heart belongs to ( )
A. Cell B. Tissue C. Organ D. System
3. Among the following structures, which one is an organ ( )
A. Sweat glands B. Blood C. Elastic fibers D. Stomach
4. The periosteum belongs to ( )
A. Epithelial tissue B. Connective tissue
C. Muscle tissue D. Nervous tissue
5. A complete bone belongs to ( )
A. Cell B. Tissue
C. Organ D. System
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"Structural Levels of Animal Bodies" How cells constitute living organisms PPT courseware 6:
"Structural Levels of Animal Bodies" How Cells Constitute Organisms PPT Courseware 6 Question: The growth of animals and human bodies starts from one cell. What kind of cell is it? What changes does it undergo to become multiple cells? The cells formed by the division of the fertilized egg are only spherical...
"Structural Levels of Animal Bodies" How cells constitute living organisms PPT courseware 5:
"Structural Levels of Animal Bodies" How cells constitute living organisms PPT courseware 5 Think about it. The growth of flatfish starts with one cell. What kind of cell is it? What changes did this cell undergo to become a flatfish (cell group)? Cell Differentiation:..
"Structural Levels of Animal Bodies" How cells constitute living organisms PPT courseware 4:
"Structural Levels of Animal Bodies" How Cells Constitute Organisms PPT Courseware 4 Cell Differentiation Later, most cells lost the ability to divide. During development, they undergo differential changes in morphology, structure and physiological function. This process is called cell differentiation. ..