TEKS

7.12 Organisms and environments. The student knows that living systems at all levels of organization demonstrate the complementary nature of structure and function. The student is expected to:

• 7.12B identify the main functions of the systems of the human organism including circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems
• 7.12E compare the functions of a cell to the functions of organisms such as waste removal

7.6 Matter and energy. The student knows that matter has physical and chemical properties and can undergo physical and chemical changes. The student is expected to:

• 7.6A [revisit] identify that organic compounds contain carbon and other elements such as hydrogen, oxygen, phosphorus, nitrogen or sulfur
• 7.6B distinguish between physical and chemical changes in matter in the digestive system
• 7.6C recognize how large molecules are broken down into smaller molecules such as carbohydrates can be broken down into sugars

7.7 Matter and energy. The student knows that there is a relationship between force, motion, and energy. The student is expected to:

• 7. 7A [apply to skeletal muscular system] contrast situations where work is done with different amounts of force to situations where no work is done such as moving a box with a ramp and without a ramp, or standing still
• 7.7B. illustrate the transformation of energy within an organism such as the transfer from chemical energy to heat and thermal energy in digestion

7.13 Organisms and environments. The student knows that a living organism must be able to maintain balance in stable internal conditions in response to external and internal stimuli. The student is expected to:

• 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and fight or flight
• 7.13B. describe and relate responses in organisms that may result from internal stimuli such as wilting in plants and fever or vomiting in animals that allow them to maintain balance