WorksheetsAll About the Human Body — Key Definitions (5th Grade)
Total questions: 45
Worksheet time: 27mins
What is the system that breaks down the food you eat into smaller parts your body can use for energy and growth? It includes the mouth, esophagus, stomach, small intestine, large intestine, and other organs that help digest food.
Digestive System
Respiratory System
Circulatory System
Nervous System
Which system moves blood around the body and includes the heart, blood, and blood vessels (arteries, veins, and capillaries)? This system carries oxygen and nutrients to cells and removes waste.
Circulatory System
Respiratory System
Digestive System
Nervous System
What is the large, dome-shaped muscle under the lungs that helps you breathe by moving down when you inhale and moving up when you exhale?
Diaphragm
Trachea
Larynx
Bronchi
What is a part of the body made of different tissues that work together to do a specific job, such as the heart, stomach, lungs, and brain?
Organ
Cell
Atom
Bone
What term refers to the senses and how the body notices the world, including sight, hearing, taste, smell, and touch? Sensory organs include eyes, ears, tongue, nose, and skin.
Sensory
Motor
Digestive
Respiratory
What are the smaller parts of blood that have special jobs, including red blood cells and white blood cells?
Blood Cells
Blood Plasma
Blood Vessels
Blood Platelets
Which special proteins speed up chemical reactions in the body and help break down food into nutrients that the body can absorb?
Enzymes
Hormones
Vitamins
What are blood vessels that carry oxygen-rich blood away from the heart to the body’s organs and tissues called?
Arteries
Capillaries
What tiny blood vessels connect arteries and veins and allow oxygen, nutrients, and waste to pass between the blood and the body’s cells?
Capillaries
Arterioles
Venules
Veins
Which cells carry oxygen from the lungs to the rest of the body and bring some carbon dioxide back to the lungs?
Red Blood Cells
White Blood Cells
Platelets
Nerve Cells
Which cells help fight infection and keep the body healthy by identifying and destroying germs like bacteria and viruses?
White Blood Cells
Red Blood Cells
Platelets
Muscle Cells
What happens when harmful germs (bacteria, viruses, fungi, or parasites) enter the body and begin to multiply?
Infection
Digestion
Evaporation
Photosynthesis
What is oxygen used for in the body?
To produce energy in living cells.
To help digest food in the stomach.
To control body temperature.
Stomach acid is a strong liquid in the stomach that helps break down food and kills many germs that enter with food. It is part of ________.
digestion
respiration
circulation
excretion
What is the function of mucus in the body?
It traps dust, germs, and other particles, and keeps tissues moist.
It produces hormones for growth.
It breaks down food into nutrients.
It transports oxygen in the blood.
What is the main function of the circulatory system?
To move blood, oxygen, nutrients, and waste around the body.
To control body temperature.
To produce hormones for growth.
To break down food for energy.
How many chambers does the heart have?
Four chambers
Two chambers
Three chambers
Fill in the blank: ______ carry blood back to the heart (usually carrying carbon dioxide and waste).
Veins
Arteries
Capillaries
Aorta
Fill in the blank: ______ are tiny vessels where materials pass between blood and body cells.
Capillaries
Arteries
Veins
Nerves
Which type of blood cell carries oxygen using a protein called hemoglobin?
White blood cells
Platelets
Red blood cells
Plasma
Which type of blood cell fights infections?
Red blood cells
White blood cells
Platelets
Plasma
Which part of the blood helps stop bleeding by forming clots?
Plasma
Platelets
Red blood cells
White blood cells
What is the main function of pulmonary circulation?
To deliver oxygen-rich blood to the body
To pick up oxygen and release carbon dioxide in the lungs
To fight infections
To form blood clots
Why is the circulatory system important?
It delivers oxygen and nutrients to all body cells so they can make energy.
It helps stop bleeding by forming clots.
It fights infections.
It carries waste only.
Pulmonary circulation is the process in which blood is carried from the heart to the lungs and back to the heart. Which of the following best describes what happens in pulmonary circulation?
Blood is carried from the heart to the lungs for oxygenation and then returns to the heart.
Blood is carried from the heart to the body tissues and then returns to the heart.
Blood is carried from the lungs to the body tissues and then returns to the lungs.
Blood is carried from the heart to the kidneys and then returns to the heart.
List two types of cells in blood and what each does.
Red blood cells carry oxygen; white blood cells fight infection.
Platelets carry oxygen; red blood cells fight infection.
White blood cells transport nutrients; platelets fight infection.
Red blood cells fight infection; platelets carry oxygen.
What is the function of the mouth in the digestive system?
The mouth chews food into smaller pieces and mixes it with saliva to help break it down, forming a soft ball of food called a bolus.
The mouth absorbs nutrients directly into the bloodstream.
What is the function of the esophagus in the digestive system?
The esophagus moves the bolus from your mouth to your stomach by squeezing in a wave-like way (called peristalsis).
The esophagus produces digestive enzymes to break down food.
The esophagus absorbs nutrients from food into the bloodstream.
The esophagus stores food before it enters the stomach.
Which organ mixes food with stomach juices and turns it into a thick liquid called chyme?
Esophagus
Stomach
Small intestine
Pancreas
The gallbladder stores bile and releases it into the ______ when needed.
small intestine
large intestine
stomach
Which organ makes juices that help digest carbohydrates, proteins, and fats, and also helps control blood sugar by making insulin?
Liver
Pancreas
Large intestine
Stomach
The large intestine absorbs water and some minerals from the remaining food matter. What does it turn the leftover material into?
Stool (waste)
Urine
Blood
Saliva
How does digestion help your body?
Provides energy for running, thinking, and growing.
Supplies nutrients that repair cells and build bones and muscles.
Removes waste that your body cannot use.
Makes you sleepy.
Mechanical digestion is the physical breaking of food, such as ______ and ______.
chewing, stomach churning
swallowing, absorption
digestion, respiration
filtration, excretion
Chemical digestion uses chemicals like saliva, stomach acid, enzymes, and bile to break food into tiny pieces the body can absorb.
True
False
Which of the following is a good habit for a healthy digestive system?
Eat a variety of foods
Drink plenty of water
Eat fiber-rich foods
All of the above
Regular exercise helps digestion and moves food through your system.
True
False
Why is it important to wash your hands before eating?
To prevent germs that can upset your stomach.
To make your hands look shiny.
To cool down your hands.
To waste water.
Which of the following lists correctly labels the main parts of the digestive system in order: mouth, esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas, rectum, anus?
Mouth, Esophagus, Stomach, Small Intestine, Large Intestine, Liver, Gallbladder, Pancreas, Rectum, Anus
Mouth, Stomach, Esophagus, Small Intestine, Large Intestine, Liver, Pancreas, Gallbladder, Rectum, Anus
The stomach is a part of the digestive system. What does it do?
It stores and mixes food, beginning the digestion of proteins.
It absorbs nutrients into the bloodstream.
It produces insulin to regulate blood sugar.
It filters toxins from the blood.
Identify the Bronchi.
Label the respiratory system.
Diaphragm
Lung
Trachea
Bronchiole
Alveoli
Label the parts of the respiratory system
diaphragm
alveoli
trachea
bronchi
lungs
Click on the left lung
Select the respiratory system.
