NSES Content Standard C  Life Science: Structure and function in living systems Grades 5-8, page 156 The human organism has systems for digestion, respiration, reproduction, circulation, excretion, movement, control and coordination, and for protection from disease. These systems interact with one another.

 
Benchmark 5A The Living Environment: Diversity of Life
Grades 6-8, page 104
Animals and plants have a great variety of body plans and internal structures that contribute to their being able to make or find food and reproduce.

Benchmark 6A The Human Organism: Human Identity
Grades 6-8, page 129
Like other animals, human beings have body systems for obtaining and providing energy, defense, reproduction, and the coordination of body functions.

Benchmark 6C The Human Organism: Basic Functions
Grades 6-8, page 137
To burn food for the release of energy stored in it, oxygen must be supplied to cells, and carbon dioxide removed. Lungs take in oxygen for the combustion of food and they eliminate the carbon dioxide produced. The urinary system disposes of dissolved waste molecules, the intestinal tract removes solid wastes, and the skin and lungs rid the body of heat energy. The circulatory system moves all these substances to or from cells where they are needed or produced, responding to changing demands.

Benchmark 6C The Human Organism: Basic Functions
Grades 6-8, page 137
Specialized cells and the molecules they produce identify and destroy microbes that get inside the body.

Benchmark 6C The Human Organism: Basic Functions
Grades 6-8, page 137
Hormones are chemicals from glands that affect other body parts. They are involved in helping the body respond to danger and in regulating human growth, development, and reproduction.

Benchmark 6C The Human Organism: Basic Functions
Grades 9-12, page 138
The immune system is designed to protect against microscopic organisms and foreign substances that enter from outside the body and against some cancer cells that arise within.

Benchmark 6C The Human Organism: Basic Functions
Grades 9-12, page 138
The nervous system works by electrochemical signals in the nerves and from one nerve to the next. The hormonal system exerts its influences by chemicals that circulate in the blood. These two systems also affect each other in coordinating body systems.

Benchmark 6E The Human Organism: Physical Health
Grades 6-8, page 145
White blood cells engulf invaders or produce antibodies that attack them or mark them for killing by other white cells. The antibodies produced will remain and can fight off subsequent invaders of the same kind.