Intake and Output in the Human Body
This worksheet covers key concepts related to intake and output in the human body, focusing on the digestive, respiratory, and excretory systems for Grade 9 Science.
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Intake and Output in the Human Body
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Read each question carefully and answer to the best of your ability. For multiple-choice questions, circle the correct option. For fill-in-the-blanks, complete the sentence. For short answer questions, provide a concise and accurate response.
1. Which of the following is the primary site for nutrient absorption in the digestive system?
Stomach
Large intestine
Small intestine
Esophagus
2. What gas is taken in by the respiratory system?
Carbon dioxide
Nitrogen
Oxygen
Methane
3. The process of breaking down food into molecules the body can use is called .
4. The kidneys are part of the system and are responsible for filtering waste from the blood.
5. During exhalation, is released from the body.
6. Briefly explain the difference between mechanical and chemical digestion.
7. Label the indicated organs in the human digestive system diagram below.
A:
B:
C:
D:
8. The diaphragm contracts during inhalation, causing air to be drawn into the lungs.
True
False
9. Urine is produced in the liver.
True
False
10. Describe the journey of a bite of food from the mouth to the excretion of waste, highlighting the key organs and processes involved in digestion and absorption.