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BIOL701B-PEP-CN Junior High

【人教版】Junior High Biology Grade 7 Volume 2

This textbook is for the Grade 7 (second semester) biology curriculum standard, with the theme of "Humans in the Biosphere." It covers the origin and evolution of humans, human nutrition, respiration, blood circulation, waste excretion, neural and hormonal regulation, as well as the impact of human activities on the ecological environment.

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本课程探讨了人类起源与进化的科学证据,重点阐述了森林古猿在环境变迁驱动下,通过直立行走实现人猿分界并最终演化为现代人类的历程。学习目标在于理解化石证据的重要性,掌握区分科学事实与观点的逻辑思维,并认识到人类与现代类人猿的亲缘关系及保护生物多样性的意义。

本课程探讨了人体所需的六大营养物质及其功能,重点分析了消化系统如何通过物理和化学作用将食物转化为能量与构建原料。通过学习营养素的科学摄入、消化器官的协同机制以及能量测定方法,学生将掌握平衡膳食的原则,并理解生命活动中物质与能量转化的核心逻辑。

本节课介绍了呼吸系统的组成,重点阐述了呼吸道作为气体通道与预处理车间的功能,以及肺作为气体交换场所的生理作用。通过学习呼吸道骨或软骨支架的结构特点,学生能够理解人体如何维持气道通畅,并认识到呼吸道在温暖、湿润和清洁空气方面的防御机制及其局限性。

本课程重点介绍了血液的组成成分及其生理功能,并详细阐述了动脉、静脉与毛细血管的结构特点及其与物质运输、交换功能相适应的机制。通过学习,学生能够理解血液循环系统如何通过各部分的协同工作,实现人体内营养物质、氧气及代谢废物的有效运输与交换。

本课程探讨了人类对血液循环认识的科学演进,从古代的朴素直觉跨越到哈维通过定量实验揭示的闭合循环系统。课程重点介绍了血量与人体健康的量化关系、失血的代偿阈值,以及兰德斯坦纳发现的ABO血型系统对现代安全输血的重要意义。

本课程深入探讨了人体神经系统与感官的运作机制,重点分析了视觉与听觉的形成过程、近视的科学防治以及神经系统的结构组成。通过对眼耳卫生保健及神经系统功能的学习,学生将理解人体如何通过复杂的生物换能与信号传导,实现对外界环境的精准感知与生命活动的协调调节。

本课程通过“地球飞船”模型阐述了人类与生物圈的紧密联结,强调了地球作为封闭系统在资源承载力、人口增长及环境影响方面的局限性。学习目标在于引导学生认识人类活动对生态平衡的双重影响,理解生物入侵的危害,并树立可持续发展的科学观念。

Course Overview

📚 Content Summary

This textbook is a biology curriculum standard textbook for the second semester of Grade 7 in junior high school, with the theme "Humans in the Biosphere." The content covers the origin and evolution of humans, human nutrition, respiration, blood circulation, waste excretion, neural and hormonal regulation, as well as the impact of human activities on the ecological environment.

Explore the origins of life, decode the structure of the human body, and build a harmonious ecology together.

Author: People's Education Press, Curriculum and Teaching Materials Research Institute, Biology Curriculum and Teaching Materials Research and Development Center

Acknowledgments: This book was co-authored by multiple biologists and frontline teachers; images provided by Zhu Jing, Feng Yaohua, Liu Weiqiang, Ding Huanxin, Xin Tai, Li Chuan, Liu Yaqin, Chen Shuwen, Zhang Junxia, etc.; cover and layout designed by Wenlu Studio, among others.

🎯 Learning Objectives

  1. Summarize that humans originated from forest-dwelling apes, and describe the changes in morphological structure and lifestyle during the evolution from ape to human.
  2. Be able to distinguish between scientific facts and opinions, and understand the process of childbirth and "test-tube baby" technology.
  3. Identify the physiological and psychological changes during adolescence, and develop good adolescent hygiene habits.
  4. Be able to name the six types of nutrients required by the human body and their functions, and attempt to measure the energy in food.
  5. Be able to describe the composition of the human digestive system, and summarize the process of food digestion and nutrient absorption.
  6. Explain the characteristics of the small intestine's structure that suit its function, and explain why the small intestine is the main organ for absorption.
  7. Be able to accurately name the organs composing the respiratory system, and identify the main nutritional information on food ingredient labels.
  8. Explain how the structure of the respiratory tract is adapted to its function of air processing, and understand the limitations of the respiratory tract's air processing capacity.
  9. Through experiments simulating diaphragm movement, explain the relationship between changes in chest cavity volume and breathing, and be able to explain practical life issues such as long-distance running and drowning rescue.
  10. Be able to identify the components of blood (plasma and blood cells), and describe the main functions of each component.

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