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McGraw Hill Unit 2 (7th Grade)

STUDY
PLAY
Variation
A trait that makes an individual different from other members of its species.
Camouflage
When an organism blends into its environment
Homologous Structures
Body parts that are similar in origin and structure
Vestigial Structures
Body parts that are reduced in size with no apparent function.
Natural Selection
Survival of the fittest.
Embryology
Study of the development of the embryos of organisms.
Circulation
Arteries transport oxygen to your organs.
Digestion
Chewing begins this process.
Excretion
Some foods travel through the entire digestive system without being digested or absorbed.
Homestasis
The human body maintains steady internal conditions.
Lymphatic System
Your body fights many infections with this.
Nutrition
your read the label on food to check this information.
Respiration
Air passes from the nose to the pharynx, trachea, bronchi, and lungs.