"Our Life Cycle" Animal life cycle PPT courseware

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"Our Life Cycle" Animal life cycle PPT courseware

Think and discuss:

※ Where do we come from?

※ What did we look like when we were first born?

※ What changes have occurred in our bodies from birth to now?

I noticed that my body was changing:

When he was born, he was only 50 centimeters tall and weighed only about 7 pounds. He lay or was held all day long. Except for feeding, he spent most of the time sleeping. He would cry when he was hungry and could not speak.

Now I have grown to over 1 meter tall and weighed over 50 kilograms. I have a row of neat teeth, can walk, talk, read and write, sing and dance, etc.

Adolescence is the transitional stage from (childhood) to (adulthood).

Reasonable diet and adequate nutrition

Get enough sleep and exercise

It is an important condition to ensure our normal growth.

people at different growth stages

Read Figure 3-1 to explore: What periods do people go through after birth? What age groups are occupied by each period?

During the infant period, 0-1 years old, babies grow quickly and their brains develop the fastest.

Infancy: 1-2 years old. Able to be interested in things around.

When children are 2-3 years old, they learn to walk and begin to learn to speak.

Children aged 3-12 years old, relatively short, with relatively tender skin, weight and height grow quickly, etc.

Adolescence 11, 12-14, 15 years old, rapid development

Youth between the ages of 16 and 30 are at their strongest and their physical development is complete.

Middle-aged 35-60 years old, relatively tall, strong body, wrinkles are beginning to appear on the skin, weight and height are relatively stable, etc.

Old age: After 60 years old. The body is a bit hunched, the skin is older, more wrinkles, gray hair, inflexible legs and feet, tooth loss, etc.

Main characteristics of different age groups

Infants (under 1 year old): Feed mainly on milk, grow and develop rapidly, begin to grow deciduous teeth, can sit, crawl, start to learn to walk, and can speak monosyllables.

Children's group: deciduous teeth have fallen out and permanent teeth have grown in; the skin is delicate and delicate, the height and weight increase rapidly, and they can dress and eat by themselves; they have gone to school, know a lot of words, and can do arithmetic of addition, subtraction, multiplication and division. He can answer questions, can skip rope, kick shuttlecock, run and jump, and can help his mother with simple housework.

Youth group: They have grown much taller than when they were children, their bodies are very strong, their skin is smooth, they are very strong, they have begun to grow beards, and their voices have also changed; they have learned a lot of knowledge and can have their own ideas for doing things; many people get married and have children. A child.

Middle-aged group: The body has completely stopped growing; some people have begun to gain weight, their skin has begun to wrinkle, their energy and physical strength are not as good as that of young people, their memory has begun to decline, and their eyes have begun to suffer from presbyopia.

Elderly group: gray hair, need to wear reading glasses to see, teeth cannot chew hard things, some people have dentures, limbs are not flexible, many wrinkles and age spots on the face, memory decline, retired at home, more susceptible to illness, etc.

summary:

1. Animals go through growth periods such as birth, growth and development, reproduction, and death throughout their lives. These periods constitute the animal's life cycle. Life continues in this recurring movement.

2. The life cycle time is the life span of this animal.

But doesn’t it mean that all animals go through the entire life cycle? Do you know what factors affect their lifespan?

2. Life span of animals

1. Animals have to go through growth periods such as ---, ---, ---, --- throughout their lives. These growth periods constitute the animal's ---.

2. ——— time is the life span of this animal. However, changes in living environment factors such as climate, ---, ---, etc. have a greater impact on the life span of animals.

Consolidation exercises:

1. The starting point of human life cycle is ( )

A. Fetus B. Fertilized egg

C. Baby D. Egg cell

2. What processes does any life go through in sequence?

Answer: It has experienced the processes of birth, growth and development, reproduction and death.

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"Our Life Cycle" Animal life cycle PPT download:

"Our Life Cycle" Animal Life Cycle PPT Download Part One Content: Introduction of New Knowledge Through the study of the previous lessons, we already know that all animals will go through a life cycle of birth, growth, development, reproduction, and death, so the human life cycle. .

"Our Life Cycle" Animal Life Cycle PPT:

"Our Life Cycle" Animal Life Cycle PPT Part One: Our Birth, Growth and Changes All animals have their own life cycle. What is the human life cycle? Where did we come from? The fertilized egg attaches to the mother's uterine wall..

"Our Life Cycle" Animal Life Cycle PPT Courseware 3:

"Our Life Cycle" Animal Life Cycle PPT Courseware 3 Learning Objectives: 1. Collect and organize data on your body's growth and changes from birth to the present. And predict what changes will happen to your body in the future. 2. Investigate the physical characteristics of people of different ages. 3..

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Update Time: 2024-07-30

This template belongs to science courseware Third Grade Science Volume 2, Textbook Edition industry PPT template

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