Fifth Grade Science: Organ Systems

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Questions and Answers

Which of the following is the correct order of organizational structure in a multicellular organism?

  • Tissue, cell, organ, organism, organ system
  • Cell, tissue, organ, organ system, organism (correct)
  • Organ, organism, cell, tissue, organ system
  • Organism, organ system, organ, tissue, cell

Which statement best describes the relationship between the skeletal and muscular systems?

  • The skeletal system protects the muscular system from external forces.
  • The skeletal system generates energy for the muscular system.
  • The muscular system provides support while the skeletal system facilitates movement.
  • The muscular system contracts to move the bones of the skeletal system. (correct)

The primary function of the respiratory system is to:

  • Transport nutrients throughout the body.
  • Filter waste from the blood.
  • Break down food into smaller molecules.
  • Exchange gases between the body and the environment. (correct)

Which of the following components of blood is primarily responsible for transporting oxygen?

<p>Red blood cells (D)</p>
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What is the main role of the digestive system?

<p>To break down food and absorb nutrients. (B)</p>
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Which part of the nervous system is responsible for involuntary actions, such as heart beating and breathing?

<p>Brain Stem (A)</p>
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In the human body, the lungs are the main organ of the respiratory system. Which of the following structures represents the functional units where gas exchange occurs within the lungs?

<p>Alveoli (C)</p>
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Which of the following scenarios best demonstrates how the muscular and skeletal systems work together to facilitate movement?

<p>Biceps contract, pulling on the bones of the forearm to flex the arm at the elbow. (C)</p>
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Which of the following processes is primarily controlled by the smooth muscles?

<p>Digesting food in the stomach. (B)</p>
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Which of the following statements best describes the role of the epiglottis?

<p>It prevents food from entering the trachea. (A)</p>
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What is the function of villi and microvilli in the small intestine?

<p>To increase the surface area for nutrient absorption. (B)</p>
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Which part of the digestive system is primarily responsible for absorbing water from undigested material?

<p>Large intestine (B)</p>
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What role do sensory nerves play in the nervous system?

<p>They carry messages from outside the body to the brain. (C)</p>
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The cerebrum is the largest part of the brain. What functions does it control?

<p>Thinking and voluntary movement (A)</p>
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The central nervous system consists of what?

<p>Brain and spinal cord (B)</p>
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Tendons connect bones to bones.

<p>False (A)</p>
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Which of the following is NOT part of the respiratory system?

<p>Esophagus (C)</p>
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Which system does a doctor check if he is examining for oxygen-rich flow?

<p>Circulatory System (D)</p>
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What structure in the digestive system acts like a trapdoor, closing off your trachea (windpipe) when you swallow?

<p>Epiglottis (D)</p>
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Lungs moves air down into____ then into ____ then into_____

<p>Bronchi, Bronchioles, Alveoli (A)</p>
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Flashcards

What is a Cell?

The smallest unit that makes up all living organisms and the tissues of the body.

What is a Tissue?

A group of cells that have similar structure and function working together as a unit.

What is an Organ?

A structure composed of a group of tissues working together to perform a specific function.

What is an Organ System?

A group of organs working together to perform a common function.

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What is an Organism?

Living thing with an organized structure.

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What is the skeletal system?

Provides structure, protects organs, allows movement, stores minerals, and produces red blood cells.

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What is the muscular system?

Provides voluntary and involuntary movement of the body and its systems.

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What is the digestive system?

Breaks down food, absorbs nutrients, and eliminates waste.

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What is the respiratory system?

Takes in oxygen and releases carbon dioxide, enabling respiration.

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What is the circulatory system?

Transports oxygen, nutrients, and hormones throughout the body and removes waste.

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What is the nervous system?

Controls feelings, movement, sensations, pain, reflexes, and carries messages to/from the brain.

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What does the cranium do?

Protects the brain.

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What do the Pelvis do?

Supports upper body, allows movement.

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What do tendons do?

Connects muscle to bone.

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What do ligaments do?

Connect bone to bone.

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What are Alveoli?

Exchange gases(oxygen) in your lungs.

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What do Arteries do?

Carries oxygen rich blood away from your heart.

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What do Veins do?

Carries oxygen poor blood back to your heart.

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What does the Cerebrum do?

Largest part of the brain; controls thinking and voluntary movement.

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What does the Cerebellum do?

Controls motor movement, balance and equilibrium.

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