I. Grade/Course Title: 7th Grade Science
a. Course Overview/Description: ______________________________________________________
b. Quarter: Four
II. Unit #6 LIFE SYSTEMS: BIOCHEMICAL Unit Length 5 weeks
a. Unit Introduction: The human body is a complex organism that is made up of a number of different body systems. Each system carries out a specific life process contributing to the body as a whole. The digestive, respiratory, and circulatory systems work in concert to provide our cells with nutrients and oxygen needed for energy production, growth, and repair. The digestive system breaks down food in the digestive tract into nutrients that can be transported by the circulatory system. The respiratory system provides oxygen from the air to the blood and returns the waste product carbon dioxide from the blood to the air. The circulatory system supplies the vital nutrients to all cells of the body.
b. Standards for Unit #6
· C 16. Describe the structures of the human digestive, respiratory and circulatory systems, and explain how they function to bring oxygen and nutrients to the cells and expel waste materials.
CT State Grade Level Expectations (Draft)
c. Essential Questions:
1. How does the digestive system break down food?
2. How do different enzymes work on different foods?
3. How do nutrients enter the blood stream?
4. What are the components of the digestive system?
5. How do nutrients and oxygen enter the cell?
6. What are the components of the circulatory system?
7. How does blood move through the arteries and veins?
8 How is oxygen exchanged in the alveoli?
d. Essential Content/Concepts:
1. The digestive system breaks down food that can be absorbed into the blood.
2. The digestive system consists of the digestive tract and the accessory organs.
3. Accessory organs produce digestive enzymes that are released into the digestive tract.
4. The digestive system breaks down food by physical and chemical means.
5. The circulatory system transports needed nutrients to all body cells and carries away cell waste products.
6. The components of the circulatory system are the heart, blood, arteries, veins, and capillaries.
7. The capillaries allow exchange between blood and cells in other tissues.
8. Blood is a liquid tissue that consists of plasma, red blood cells, white blood cells, and platelets.
9. The heart is a muscle that contracts regularly to pump blood throughout the body.
10. The respiratory system provides oxygen to the body.
11. The components of the respiratory are the trachea, bronchi, and air sacs.
12. Respiratory gases are exchanged in the alveoli.
e. Essential Skills:
1. Identify major components of the circulatory, respiratory, and digestive system.
2. Draw conclusions from data collected in an experiment.
Digestive tract, esophagus, stomach, small intestines, large intestines, colon, accessory organs, enzymes, feces, heart, blood, plasma, red blood cells, white blood cells, platelets arteries, veins, capillaries, lymph, trachea, bronchi, alveoli,
g. Science Misconceptions
1. The difference in size between a cell and a molecule.
2. Blood is blue in color.
3. That the stomach is the only part of the digestive system.
4. That all digestion is mechanical.
Reading For Information:
IV.. Significant Tasks (ST): Feel The Beat
a. Significant Task Introduction: In this investigation, students will explore how different movements (e.g., walking, climbing steps, lifting weights, or hand-clapping) affect pulse rate. Students will also identify independent and dependent variables, and those variables that are kept constant, when designing an experiment. They will keep a detailed and organized record of your experimental design, data collection and analysis in their science notebook and draw conclusions and identify sources of error in the experimental process.
b. Length/Timing: End of the unit
c. Essential Questions:
Why does the heart beat faster with different movements?
d. Assessment Tools (AT): Lab Report
Readings, Texts, Materials, Videos
Suggested Science Fair Topics
Example Assessment Questions
a. cell b. tissue c. organ d. organ system
a. circulatory system>cell>digestive system
b. digestive system>circulatory system>cell
c. cell>digestive system>circulatory system
d. circulatory system>digestive system>cell
a. cellular respiration b. excretion c. digestion d. circulation
10. What body process produces the carbon dioxide you exhale?