"Composition of Multicellular Organisms" PPT

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"Composition of Multicellular Organisms" PPT

Part One: Structural Hierarchy of Plants

Several main tissues of plants (review)

The epidermal cells on the surface of roots, stems, and leaves form protective tissue and have the function of protecting the tender internal parts.

Roots, stems, leaves, flowers, fruits, and seeds contain a large amount of nutrient tissue. The cell walls of vegetative tissues are thin and the vacuoles are large, which have the function of storing nutrients. The vegetative tissue containing chloroplasts can also perform photosynthesis.

Vessels in stems, leaf veins, root tip mature areas, etc. can transport water and inorganic salts and are conductive tissues.

Longitudinal section of root tip

In mature plants, there are always some undifferentiated cells that maintain the ability to divide throughout their lives. The tissue composed of such a group of cells is called a meristem. For example, the meristematic zone located at the tip of the root, the root tip, belongs to the meristematic tissue.

The cells of the meristem are small, with thin cell walls, large nuclei, and dense cytoplasm. They have a strong ability to divide and can continuously divide to produce new cells, which can then differentiate to form other tissues.

In addition to meristems, the main tissues of plants include protective tissues, vegetative tissues, conductive tissues, etc.

PPT on the composition of multicellular organisms, part 2: different tissues constitute organs

Organ: A structure made up of different tissues gathered together in a certain order and capable of performing certain physiological functions.

plant organs

Vegetative organs: roots, stems and leaves

Reproductive organs: flowers, fruits, seeds

The four major tissues of the human body

epithelial tissue

It is composed of epithelial cells and has functions such as protection and secretion.

muscle tissue

Mainly composed of muscle cells, with contraction and relaxation functions.

nervous tissue

Mainly composed of nerve cells, capable of generating and conducting excitement.

connective tissue

There are many types, bone tissue, blood, etc. are all connective tissues, which have functions such as support, connection, protection, and nutrition.

PPT on the composition of multicellular organisms, part 3 content: Class summary

1. Composition of multicellular plants

Organ: A structure in which different tissues are combined in a certain order to form a certain function.

Green flowering plants vegetative organs (roots, stems, leaves)

Reproductive organs (flowers, fruits, seeds)

Structural levels of green flowering plants: cells, tissues, organs, individuals

2. The composition of the human body

System: Different organs of the human body are combined in a certain order to form a structure with specific physiological functions.

Eight major systems of the human body:

Digestive system, respiratory system, circulatory system, urinary system, reproductive system, motor system, nervous system, endocrine system.

Under the regulation of the nervous system and endocrine system, the human body cooperates closely and coordinates to complete various life activities.

Structural levels of the human body: cells, tissues, organs, systems, individuals

PPT on the composition of multicellular organisms, part 4: practice

1. Fill in the blanks:

1. A green flowering plant is composed of six organs: _____, _____, _____, _____, _____, _____.

2. The composition levels of plants are: _____ organization _____ individual.

3. Various systems of the human body work closely together and coordinately to complete various life activities under the regulation of __________ and __________.

2. Multiple choice questions:

1. The main structural difference between the human body and the plant body is that the human body has ( )

A. Cell B. Tissue C. Organ D. System

2. Among the following items, which one is not an organ ( )

A.Tomato stems B.Broad bean flowers C.Human stomach D.Blood

3. The vegetative organs of plants do not include ( )

A. Root B. Stem C. Leaf D. Seed

4. Which system does the human liver belong to? ( )

A. Respiratory system B. Circulatory system

C. Digestive system D. Urinary system

3. Judgment questions:

1. Green flowering plants have six major organs throughout their life.

2. Each system of the human body is composed of a series of organs and has specific physiological functions.

3. The human body is composed of: cells, tissues, systems, organs, and individuals.

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, composition of multicellular organisms PPT download, .PPT format;

For more information about the PPT courseware "The Composition of Organisms and the Composition of Multicellular Organisms", please click the "Composition of Organisms PPT" and "The Composition of Multicellular Organisms" PPT tags.

"The Composition of Multicellular Organisms" PPT courseware:

"The Composition of Multicellular Organisms" PPT courseware Part One: Review the past and learn the new 1. The basic unit of life activities of organisms is ______. 2. A group of cells with similar shape, same structure, and certain functions is called ______. 3. Different tissues are due to cells...

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Update Time: 2024-07-05

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 1 industry PPT template

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