![Page 1: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/1.jpg)
![Page 2: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/2.jpg)
The levels of organizations : (from smallest to largest)
• Cells
• Tissues
• Organs
• Organ systems
• Organism
• Population
Population
![Page 3: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/3.jpg)
A cell is the basic unit of structure and function in a living thing.
![Page 4: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/4.jpg)
Nerve cells and muscles cells are examples of cells found in the body.
Nerve Cell Muscle Cell
![Page 5: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/5.jpg)
A tissue is a group of similar cells that perform the same function.
![Page 6: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/6.jpg)
Nerve tissue carries messages back and forth between the brain and every other part of the body.
![Page 7: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/7.jpg)
Muscle tissue can contract and make parts of the body move.
![Page 8: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/8.jpg)
An organ is a structure that is composed of different kinds of tissue.
![Page 9: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/9.jpg)
The Heart
The heart is a hollow, muscular organ that pumps blood throughout the body.
![Page 10: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/10.jpg)
The Stomach
The stomach helps in the digestion of food by mixing it with digestive juices and churning it into a thin liquid.
![Page 11: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/11.jpg)
An organ system is a group of organs that work together to perform a major function.
![Page 12: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/12.jpg)
Circulatory System
The circulatory system does the following:– attacks disease causing
microorganisms– carries oxygen, glucose
and other much needed materials to cells
– carries waste products away from cells
![Page 13: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/13.jpg)
Digestive System
The digestive system:– breaks down food into
molecules that the body can use.
– absorbs food molecules into the blood.
– eliminates undigested wastes from the body.
![Page 14: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/14.jpg)
Organism
An organism is anything that can independently carry out life processes.
![Page 15: The levels of organizations : (from smallest to largest) Cells Tissues Organs Organ systems Organism Population](https://reader033.vdocuments.us/reader033/viewer/2022061520/56649ea95503460f94badd62/html5/thumbnails/15.jpg)
Population
A population is a group of organisms of the same species that live together in the same area.