Grade 5 science worksheet on human body systems, including matching and identification tasks.

Let's solve the worksheet step by step and explain each answer.

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1. Match each human body system with its corresponding organs.

We are given six body systems on the left and six organ lists (a–f) on the right. We need to match them correctly.

#### The Circulatory System → d. The heart, blood and blood vessels
- The circulatory system is responsible for transporting blood, oxygen, nutrients, and waste products throughout the body. The heart pumps blood, and blood vessels (arteries, veins, capillaries) carry it.

#### The Respiratory System → f. Mouth, pharynx, lungs, bronchi
- This system helps in breathing. Air enters through the mouth or nose, travels down the pharynx, trachea, bronchi, and into the lungs where gas exchange occurs.

#### The Digestive System → b. The mouth, salivary glands, esophagus, stomach, liver, intestines
- This system breaks down food into nutrients. It starts at the mouth and continues through the digestive tract (esophagus, stomach, intestines), with help from organs like the liver and salivary glands.

#### The Skeletal System → e. The bones in the body
- The skeletal system provides structure and support. It includes all the bones in the body, which protect internal organs and allow movement.

#### The Muscular System → c. The muscles in the body
- This system allows movement. Muscles contract to move bones and other parts of the body.

#### The Nervous System → a. The brain, spinal cord and nerves
- This system controls and coordinates body activities. The brain processes information, the spinal cord transmits signals, and nerves connect them to the rest of the body.

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✔ Answers for Question 1:
- The Circulatory System → d
- The Respiratory System → f
- The Digestive System → b
- The Skeletal System → e
- The Muscular System → c
- The Nervous System → a

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2. Read the question and state the human body system that does the job indicated.

Now let’s identify which system performs each function:

#### - Helps humans turn their food into energy? → Digestive System
- The digestive system breaks down food into nutrients that cells can use for energy.

#### - Helps humans breathe? → Respiratory System
- The respiratory system brings in oxygen and removes carbon dioxide during breathing.

#### - Controls other body systems? → Nervous System
- The nervous system sends signals to coordinate actions of all other systems.

#### - Provides structure for the body? → Skeletal System
- The bones form the framework of the body and give it shape and support.

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✔ Answers for Question 2:
- Helps humans turn their food into energy? → Digestive System
- Helps humans breathe? → Respiratory System
- Controls other body systems? → Nervous System
- Provides structure for the body? → Skeletal System

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✔ Final Answers Summary:

#### Question 1: Matching
- The Circulatory System → d
- The Respiratory System → f
- The Digestive System → b
- The Skeletal System → e
- The Muscular System → c
- The Nervous System → a

#### Question 2: Functions
- Turns food into energy → Digestive System
- Helps breathe → Respiratory System
- Controls other systems → Nervous System
- Provides structure → Skeletal System

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This worksheet teaches students how different body systems work and what organs they include. Understanding these systems helps build a foundation for learning about human biology!