【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.
Lessons
Lesson
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
- Summarize that humans originated from forest-dwelling apes, and describe the changes in morphological structure and lifestyle during the evolution from ape to human.
- Be able to distinguish between scientific facts and opinions, and understand the process of childbirth and "test-tube baby" technology.
- Identify the physiological and psychological changes during adolescence, and develop good adolescent hygiene habits.
- 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.
- Be able to describe the composition of the human digestive system, and summarize the process of food digestion and nutrient absorption.
- 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.
- Be able to accurately name the organs composing the respiratory system, and identify the main nutritional information on food ingredient labels.
- 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.
- 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.
- Be able to identify the components of blood (plasma and blood cells), and describe the main functions of each component.
Lessons
Overview: This lesson covers the complete process of human origin, reproductive development, and adolescent changes. Starting from the evolutionary journey from forest-dwelling apes to modern humans, through skill training in distinguishing "facts" from "opinions," it delves into the physiological significance of childbirth, the development of assisted reproductive technology (test-tube babies), and the dramatic physical and psychological changes and health care for boys and girls upon entering adolescence.
Learning Outcomes:
- Summarize that humans originated from forest-dwelling apes, and describe the changes in morphological structure and lifestyle during evolution from ape to human.
- Be able to distinguish between scientific facts and opinions, and understand the process of childbirth and "test-tube baby" technology.
- Identify the physiological and psychological changes during adolescence, and develop good adolescent hygiene habits.
Overview: This unit详细介绍 the functions and sources of the six major types of nutrients required by the human body (carbohydrates, fats, proteins, water, minerals, vitamins) and the seventh class of nutrients (dietary fiber). Through learning the composition of the digestive system and the structural characteristics of the small intestine, students will understand how food is converted from macromolecules into absorbable small molecules. Finally, through the "Balanced Diet Pagoda" and food safety knowledge, students will establish scientific eating habits and healthy living awareness.
Learning Outcomes:
- 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.
- Be able to describe the composition of the human digestive system, and summarize the process of food digestion and nutrient absorption.
- 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.
Overview: This lesson covers a comprehensive analysis from a biology-related career (dietitian) to the human respiratory system. It focuses on the composition and structure of the respiratory system, detailed analysis of how the respiratory tract processes inhaled air by "warming, moistening, and cleaning," and revealing the dynamic principles of gas exchange between the lungs and the external environment (breathing movements) through demonstration experiments.
Learning Outcomes:
- Memorization and Description: Be able to accurately name the organs composing the respiratory system, and identify the main nutritional information on food ingredient labels.
- Understanding and Analysis: 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.
- Experimentation and Application: 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.
Overview: This teaching design covers the three core components of the human blood circulatory system: blood, blood vessels, and the heart. By learning the components and functions of blood, the structural characteristics of blood vessels, and the pumping mechanism of the heart, students will build a complete picture of substance transport in the human body and master the methods of scientific inquiry through microscopic observation and data recording.
Learning Outcomes:
- Be able to identify the components of blood (plasma and blood cells), and describe the main functions of each component.
- Be able to distinguish between arteries, veins, and capillaries, and explain the characteristics of their structure that suit their functions.
- Be able to describe the structure of the heart, the function of valves, and the complete pathway of blood circulation (systemic circulation, pulmonary circulation, coronary circulation).
Overview: This lesson covers the historical evolution of understanding blood circulation, the core principles of blood volume and safe blood transfusion, and the maintenance of cardiovascular health. By studying Harvey's experiments and the discovery of the ABO blood group system, students will establish a scientific evidence-based perspective and understand the significance of "component transfusion" and "voluntary blood donation" in modern medicine, while also gaining a preliminary understanding of the physiological basis for the excretion of waste products in the human body.
Learning Outcomes:
- Understand the history of the discovery of blood circulation, recognizing the driving role of experimental methods in the development of physiology.
- Master the types of ABO blood groups and the principles of safe blood transfusion, understanding the relationship between blood volume and health.
- Identify with the voluntary blood donation system, understand the advantages of component transfusion and the prevention and treatment of cardiovascular diseases.
Overview: This lesson covers the complete process of how the human body perceives the external environment (vision and hearing), processes information (composition and reflex mechanism of the nervous system), and internal regulation (hormonal regulation). By learning the structure of the eye and ear and their health care, mastering the basic unit of the nervous system – the structure of neurons and reflex arcs, and the regulatory role of major endocrine glands on life activities, students will understand how the human body achieves coordination and unity of life activities through the mechanism of "nervous regulation as the mainstay, supplemented by hormonal regulation."
Learning Outcomes:
- Identification and Description: Be able to accurately describe the structure of the eye and ear, and state the formation process of vision and hearing; identify the components of the nervous system and major endocrine glands.
- Analysis and Application: Be able to distinguish between simple reflexes and complex reflexes, explain the composition of the reflex arc, and analyze various diseases caused by hormonal imbalances.
- Practice and Health: Master the "three dos" and "four don'ts" for preventing myopia, measure reaction speed through experiments, and build health awareness for protecting sensory organs and the nervous system.
Overview: This lesson aims to explore the complex relationship between human activities and the biosphere. The curriculum covers the pressure of population growth on the environment, the positive and negative impacts of human activities, the hazards of biological invasion, and a focused investigation on the specific effects of environmental pollution like acid rain on organisms. Through simulated inquiry experiments, students will be guided to establish scientific environmental awareness and a concept of sustainable development.
Learning Outcomes:
- Analysis and Graphing: Be able to draw bar graphs by analyzing population growth data, elucidating the impact of population growth on resources and the environment.
- Identification and Evaluation: Distinguish between destructive and restorative human behaviors towards the ecological environment, understand the definition of biological invasion and its harm to ecological balance.
- Inquiry and Experimentation: Master the causes of acid rain formation and its pH standard, and be able to design simulated experiments to investigate the effects of acid rain on organisms (e.g., seed germination).