WikijuniorBiology英文儿童读物生物VIP专享VIP免费

Wikijunior:Biology/Printable version1Wikijunior:Biology/Printable versionTable of contents1. Introduction2. Cells3. Tissues4. Organs5. Systems1. Circulatory system2. Respiratory system3. Digestive system4. Endocrine system5. Reproductive system6. Urinary system7. Immune system8. Muscular system9. Skeletal system10. Integumentary system11. Nervous system1. Senses6. Kingdoms1. Archaea2. Bacteria3. Protists4. Fungi5. Plants1. Photosynthesis6. Animals7. Viruses8. ConclusionWikijunior:BiologyPrintableversionCellsBiology is the study of Life. It helps us understand such things as how our body works, how our body keeps warm,what we are made of and many other things. Biology is very important to know. Some subjects in Biology areGenetics, Zoology, Botany, and Ecology.Wikijunior:Biology/Printable version2What is life?Living things are not like things that are not alive.Living things are like each other. They share some things.Living things can change and grow.Living things need nutrition.Living things can move.Living things can reproduce.Living things can respond to stimulation (touch).Living things can excrete.Living things can breathe.Examples of living things are animal and plants.Cars and tables are not living things because they cannot satisfy the above 7 statements of living things.Levels of LifeLiving things can be many sizes. A living creature is called an organism. From small to large, these are how livingthings are grouped.• Cell• Tissues• Organs• Organ systems• Organisms• Populations• Communities• Ecosystems• Biomes• BiosphereWikijunior:BiologyIntroductionPrintableversionTissuesCellsPlant cellsAll living things are made of cells. They are the components andbuilding blocks of life.What is a cell?A cell is a bag of water that holds in th...