"The combination of sperm and egg gives birth to a new life" PPT download

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"The combination of sperm and egg gives birth to a new life" PPT download

Part One: Introduction of New Course

Sperm must go through a difficult journey to move to the egg. Generally, only one sperm can combine with the egg to form a fertilized egg, which then develops into a new individual through embryonic development. So, how is the human fertilization process completed? What is the process of embryonic development?

1. Through group cooperative exploration, identify sperm and eggs and describe the fertilization process.

2. Describe the process of embryonic development through pictures.

Learn about sperm and eggs

Male sperm is tadpole-shaped, with a long tail, much smaller than the egg, only about 0.06mm including head and tail.

Female eggs are visible to the naked eye and are spherical in shape with a diameter of 0.2 mm. They contain yolk in the cytoplasm and are the largest cells in the human body.

Through the previous study, we know that sperm are produced by the testicles in the male reproductive system, and eggs are produced by the ovaries in the female reproductive system. So how do sperm and eggs come together?

The combination of sperm and egg gives birth to a new life PPT, the second part of the content: new course knowledge

1. Fertilization process

fertilization

Women generally release only one mature egg each month into the fallopian tube. At this time, if it happens to meet the sperm swimming to the fallopian tube, it will combine with the sperm.

The process of combining sperm and egg to form a fertilized egg is called fertilization.

2.Embryonic development

Human embryonic development begins with a fertilized egg. As the fertilized egg slowly moves into the uterus through the fallopian tube, it begins cell division to form the initial embryo. After implantation in the uterus, the embryonic cells continue to divide and differentiate in the uterus to form various tissues, which constitute organs and systems with specific functions.

The combination of sperm and egg gives birth to a new life PPT, the third part of the content: course reflections

(1) When does new life begin?

(2) Where does the sperm and egg develop after they combine?

(3) Why is there a saying of "pregnancy in ten months"?

(4) Where do people give birth?

(5) Through what structure does the mother provide nutrients to the fetus?

do you know?

Often, a mother needs a doctor's assistance to deliver her fetus. A baby will cry a few seconds after coming out of the mother's body to remove fluid from the lungs and obtain oxygen from the external environment.

After the baby is born, the umbilical cord will be clamped by the doctor with an umbilical cord clamp and cut short about 5cm away from the baby's abdomen. Within 7-10 days, the fetus's umbilical cord slowly dries up and shrinks, leaving a scar called a "belly button" on the abdomen.

The combination of sperm and egg gives birth to a new life PPT, Part 4: Feedback in class

1.The largest cell in the human body is ( )

A.Mature egg cell B.Sperm cell

C. Nerve cells D. White blood cells

2. It takes about ( ) for a fertilized human egg to develop into a baby.

A.60 days B.280 days

C.220 days D.40 days

3. The organ that exchanges substances between the fetus and the mother is ( )

A. Placenta B. Umbilical cord

C. Uterus D. Endometrium

4. The place where the fertilized egg starts cell division is ( )

A. Uterus B. Ovary

C. Fallopian tube D. Placenta

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware for the second volume is free to download, the combination of sperm and egg gives birth to a new life PPT download, .PPT format;

For more information about the PPT courseware "The Union of Sperm and Egg Breeds New Life", please click the "The Union of Sperm and Egg Breeds New Life" PPT courseware.

"The combination of sperm and egg gives birth to a new life" PPT courseware:

The first part of the PPT courseware "Sperm and egg combine to give birth to new life": Where did I come from when introducing the new lesson? Learning objectives 1. Overview the structure and function of the male and female reproductive systems; 2. Explain that testicles and ovaries are male respectively. and the main female reproductive organs. ..

"The combination of sperm and egg gives birth to a new life" PPT:

"Sperm and egg combine to give birth to new life" PPT Part 1 content: The structure and function of the human reproductive system The function of the male reproductive system produces sperm, secretes male hormones, and transports sperm to the female reproductive organ vaginal 1 Sperm production is produced in the human testicles of semen..

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Update Time: 2024-09-08

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 2 industry PPT template

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