"Human Reproduction" The Origin of Man PPT Courseware 4

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"Human Reproduction" The Origin of Man PPT Courseware 4

Independent learning one:

Observe the textbook "Front View of the Male and Female Reproductive System" and try to complete the following questions:

1. What are the main male reproductive organs? What is the role of each?

2. What are the main female reproductive organs? What is the role of each?

3. In the male and female reproductive systems, which structures have basically the same functions?

4. What are the main functions of the male and female reproductive systems?

2. Human reproductive process

Self-study two:

Please read the textbook p9 text and p10 "Schematic diagram of ovulation, fertilization and onset of pregnancy" and try to complete the following questions:

1. What are human germ cells? In which structure is the site of fertilization? Where does the fertilized egg begin to develop?

2. What is pregnancy?

doubt:

1. How many sperm can enter the egg cell during fertilization?

2. When the fertilized egg divides, where do the nutrients it needs come from?

3. Aunt Xiao Wang was not pregnant after one year of marriage. She went to the hospital for a check-up and the doctor diagnosed her with blocked fallopian tubes. Why can’t patients with blocked fallopian tubes get pregnant?

4. What happened to the twins?

Independent learning three:

Observe the diagram in the textbook "The rough process from embryo to newborn" and combine it with the information provided in the textbook to try to complete the following questions:

1. How many weeks after pregnancy does the embryo begin to take on a human form?

2. What kind of environment does the fetus live in in the mother's womb? Where do you get the nutrients and oxygen you need? By what means are the metabolic wastes produced being eliminated?

3. Under normal circumstances, how many weeks does it take for a fetus to mature in the mother's body? By what means is the mother eliminated?

Class summary:

1. What are the main male reproductive organs? What is the role of each?

2. What are the main female reproductive organs? What is the role of each?

3. Where is the fertilization place? Where does the embryo develop? At what week in pregnancy does an embryo begin to take on a human form? At how many weeks into pregnancy does the fetus mature? Where are mature fetuses produced?

4. Where is the place for gas exchange and material exchange between the fetus and mother?

collaborative inquiry

1. What is fertilization?

2. Where is the site of fertilization?

3. What changes will happen to the fertilized egg?

4． Where should the blastocyst be implanted?

5. Describe the process of fertilization.

6. Describe the process of development

7. How do the embryo and mother exchange materials?

Compliance testing

1. The place where the embryo and fetus develop is ( )

A. Ovary B. uterus c. Fallopian tube D. vaginal

2. When does new life begin? ( )

A. Egg cell and sperm B. Fertilized egg C. Embryo D. When the baby is born

4. Fetus refers to ( )

AThe embryo from the fertilized egg to the time before the baby is born

B. The embryo from when the fertilized egg divides until the baby is born

C. From the end of the first month of embryonic development to the embryo before birth

D. The end of the second month of embryonic development, to the embryo before birth.

5. Which of the following are germ cells ( )

Sperm ② Egg cell ③ Semen ④ Ovary ⑤ Testicle

A.①②③④⑤ B. ①②③ C. ①② D. ②④

2. Judgment questions:

The formation of a fertilized egg is the beginning of a new life

People often say "Ten months of pregnancy, one day of delivery", which means that the fetus must be pregnant in the mother's body for ten months

The uterus is the reproductive organ that secretes estrogen

Twins are produced by the union of two sperm and one egg.

The blood type of the fetus can be different from that of the mother. Under normal circumstances, blood agglutination does not occur because the blood of the mother and the fetus are not directly connected.

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For more information about the PPT courseware "The Origin of Man and Human Reproduction", please click on the "Origin of Man PPT and Human Reproduction" PPT tag.

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Update Time: 2024-11-22

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

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