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Science Ch 1

Structure of Living Things

cell the smallest part of a living thing that can carry out processes of life
cell membrane a thin outer layer of a cell
cytoplasm the gel-like material inside the cell that holds all the other inner parts of the cell
nucleus a large, round structure at the center of a cell that controls all the activities of a cell
mitochondrion the part of a cell that breaks down food and turns it into energy for the cell
vacuole a cell part that holds food, water, and wastes
cell wall a hard outer layer of a plant cell that protects the cell and provides support
chloroplast a part of a plant cell that uses energy from sunlight to make food
organism an individual living thing that can carry out all its own life activities
tissue a group of similar cells that do the same job in an organism
organ a body part made of different kinds of tissues that work together to do a certain job
organ system a group of organs that work together to do a certain job
kingdom the broadest group into which living things are classified
vertebrate an animal that has a backbone
invertebrate an animal that does not have a backbone
vascular any plant that has tubes for moving water and other materials to where they are needed
nonvascular any plant that soaks up water from the ground directly into its cells
fungus an organism that cannot make its own food, but instead absorbs food from decaying organisms
bacteria one-celled living things that do not have a nucleous
protist a one- or many- celled organism that can either make, eat, or absorb food
Created by: Our Class