"Human Reproduction and Development" PPT

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"Human Reproduction and Development" PPT

Part One Content: Topic Exploration

1. When organisms grow and develop to a certain stage, new individuals will be produced, which reflects the _____ characteristics of organisms.

2. On the basis of metabolism, new individuals are produced by the ________ of the human body under the regulation of nerves and hormones.

Human reproduction and development PPT, part 2 content: course exploration

Exploration Topic 1: Distinguish between Reproduction, Growth and Development

Read the textbook and distinguish the concepts of reproduction, growth and development.

1.Reproduction

Refers to the process of biological ______________, which is a life phenomenon ubiquitous in the biological world.

2.Growth

____________________ changes in an organism.

3. Development

The structure of an organism changes from _____ to _____, and its functional activities change from _______ to _____.

[Instructions] ① The three processes of reproduction, growth and development are both different and related to each other.

② Regardless of the length of life, new individuals must go through a series of growth and development processes after birth.

③ After developing into mature individuals, new individuals are produced through the reproductive process.

Exploration Topic 2: The composition and function of the male and female reproductive systems

Read the textbook and compare the composition and functions of the male and female reproductive systems.

1.Male reproductive system

(1) [1] _____: It is the main sexual organ of the reproductive system. It can produce _____ and also secrete _________.

(2)［2］_____：__________.

(3)［4］_______: The tube that transports sperm.

(4) [5]_______ and [6]_______: Secretions provide nutrients to sperm and facilitate their activity.

(5)［8］_____ and［3］_____: The urethra in the penis is the passage for discharge of ______ and ______. The scrotum has the function of protecting ____________.

2. Female reproductive system

(1) [1] _____: It is the main sexual organ of the reproductive system, capable of producing _______ and secreting ____________.

(2)［2］_______: conveying _______ is also a place of __________.

(3)［3］_____: It is a place of _________.

[Instructions] ① Testicles and ovaries are the main sexual organs of men and women. They can reproduce offspring through the combination of germ cells produced and belong to the reproductive system.

②The testicles and ovaries can secrete male hormones and estrogen and belong to the endocrine system.

Exploration Topic 3 Germ Cells

Read the textbook and distinguish the two types of germ cells in terms of morphology and structure.

1. Picture A is _____, Picture B is _______

2. Sperm is _______, has a long tail, and can _____; egg cells are _____, and compared with sperm, its volume is _____

3. The genetic material in sperm is mainly located in its _______

4. The cytoplasm of egg cells is rich in _____, which is a nutrient in the early stages of embryonic development.

[Instructions] ① There are only two types of human reproductive cells, sperm and egg cells.

②The egg cell is the largest cell in the human body.

Exploration Theme 4: The Breeding of New Life

Read the textbook and describe the birth process of new life.

1. Fertilization

The process in which sperm and egg cells meet in __________ and combine to form a fertilized egg.

2.Embryonic development

(1) Starting point: _______.

(2) Place: fallopian tube and _____.

(3) Process: fertilized egg → embryo ____ newborn.

3. Nutrients required for embryonic development

(1) Early stage: from _____.

(2) Middle and late stages: Various nutrients and oxygen are obtained from the mother's blood through _________, and the ___________ produced by metabolism is discharged into the mother's blood, and is excreted by the mother's kidneys and _______.

[Instructions] ① The fertilized egg forms the initial embryo in the fallopian tube, and the uterus is the place where the embryo develops.

②The fertilized egg formed by fertilization between sperm and egg cells is one cell. Don't mistake it for two cells.

③The fertilized egg is not a reproductive cell. Human reproductive cells only include sperm and egg cells.

④ Nutrients in the mother's blood cannot flow directly into the fetus. The mother exchanges substances with the fetus through the placenta and umbilical cord.

Human Reproduction and Development PPT, Part 3: Life Links

1. Some people say that "test tube baby means a baby is born in a test tube". Is this correct?

Tip: This statement is not entirely correct. In fact, during the birth process of "test tube baby", the sperm and egg cells are combined to form a fertilized egg and the early development of the embryo is carried out in the test tube, and the main place for the development of the embryo and fetus is still the uterus.

2. Zhang, a man from Hebei Province, went to the plastic surgery department of a hospital in Xuzhou in August 2010 and asked for sex-changing surgery. After the sex-changing surgery, Zhang is still sterile?

Tip: Sex-transfer surgery removes the gonads and no longer has the ability to reproduce.

Keywords: Beijing Normal University version of the eighth grade biology PPT courseware for the first volume free download, human reproduction and development PPT download, .PPT format;

For more information about the PPT courseware "Reproduction and Development of Biology and Reproduction and Development of Humans", please click the Reproduction and Development of Biology ppt and Reproduction and Development of Humans ppt tags.

"Human Reproduction and Development" PPT download:

"Human Reproduction and Development" PPT Download Part One: Teaching Purpose Knowledge: 1. Tell the stages of postnatal development; 2. Explain the characteristics of pubertal development. Ability: Cultivate students to ask questions, observe, discuss, read, analyze data, etc..

"Human Reproduction and Development" PPT courseware:

"Human Reproduction and Development" PPT courseware Part One: Learning Objectives 1. Understand the characteristics of pubertal development and the concept of health care. 2. Understand the various stages of human development and other aspects. Learn the physiological characteristics of adolescence and understand that this period is a time for learning...

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Update Time: 2024-11-17

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 1 industry PPT template

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