1.
anatomy: The study of the structure of an organism
2.
animal: a living organism that feeds on organic matter
3.
archaea: One of two prokaryotic domains, the other being the Bacteria
4.
bacteria: One of two prokaryotic domains, the other being the Archaea
5.
bacteria: unicellular microorganisms that have cell walls but lack organelles and an organized nucleus
6.
cell: The simplest collection of matter that can live
7.
circulatory system: Consists of the heart, which pumps blood, and the blood vessels that transport it
8.
community: All the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction
9.
controlled experiment: Designed to compare an experimental group with a control group
10.
dependent variable: a variable whose value depends on that of another
11.
digestive system: Ingests food and breaks it down into smaller chemical units
12.
domain: A taxonomic category above the kingdom level
13.
ecosystem: All the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment
14.
eukarya: The domain of eukaryotes, organisms made of eukaryotic cells; includes all of the protists, plants, fungi, and animals
15.
eukaryote: an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus
16.
excretory system: peeing
17.
fungus: any of a group of unicellular, multicellular, or syncytial spore-producing organisms feeding on organic matter
18.
hypothesis: A tentative explanation a scientist proposes for a specific phenomenon that has been observed
19.
independent variable: a variable whose variation does not depend on that of another
20.
kingdom: A taxonomic category, the second broadest after domain
21.
molecule: Two or more atoms held together by covalent bonds
22.
muscular system: Consists of all the skeletal muscles in the body that allow us to move about and manipulate our environment
23.
negative feedback: A primary mechanism of homeostasis, whereby a change in a physiological variable that is being monitored triggers a response that counteracts the initial fluctuation
24.
nervous system: The organ system that forms a communication and coordination network among all parts of an animal's body
25.
organ: A specialized center of body function composed of several different types of tissues
26.
organ system: A group of organs that work together in performing vital body functions
27.
organism: An individual living thing
28.
physiology: The study of the functions of an organism
29.
plant: a living organism of the kind exemplified by trees, shrubs, herbs, grasses, ferns, and mosses, typically growing in a permanent site, absorbing water and inorganic substances through its roots, and synthesizing nutrients in its leaves by photosynthesis using the green pigment chlorophyll
30.
population: A group of individuals of one species that live in a particular geographic area
31.
prokaryote: a single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles
32.
respiratory system: The body's organ system for exchanging gases with the environment
33.
skeletal system: Provides body support and a protective function for the organs
34.
tissue: An integrated group of cells with a common structure and function
