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18 terms

Cells to body systems (Chapter One)

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Cell
The smallest unit of life.
Cell wall
Rigid structure that surrounds protects and gives shape to plant cells.
Nucleus
The brain or control center of the cell
Chloroplast
Organelle found in plants that converts light energy into energy plants can use.
Cell membrane
Surrounds the cell
Cytoplasm
Jelly like and contains most of the cell's organelles
Tissue
Group of cells that work together to perform a specific function.
Organ
Group of tissues that work together to perform a specific function.
Organ system
Group of organs that work together to perform a specific function.
Microscopic
Too small to be seen without using a microscope
Organism
Living thing that maintains vital life processes
Circulatory System
The organ system- made up of the heart, blood vessels, and blood- that transports materials throughout the body.
Respiratory System
The organ system including the lungs, that exchanges oxygen and carbon dioxide between the body and the environment.
Skeletal System
The organ system, including the bones, that protects the body and gives it structure.
Muscular System
The organ system that includes the muscles and allows the body to move.
Nervous System
The organ system including the brain, spinal cord, and nerves- that senses your surroundings and controls your other organs.
Excretory System
The organ system, including the kidneys and bladder, that removes waste materials from the blood.
Digestive System
The organ system that turns food into nutrients that body cells need for energy, growth, and repair.