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- Difficulty
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- Time
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Worksheet8th GradeLevel 2 · Standard
Free 8th Grade The Circulatory System: The Heart, Blood Vessels and Blood Worksheet
Students name the chambers, valves and main blood vessels of the heart and trace the path of blood through the double circulation to the lungs and body. They compare arteries, veins and capillaries, describe the jobs of red blood cells, white blood cells, platelets and plasma, and calculate heart rate and cardiac output from pulse data before and after exercise.
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- Grade
- 8th Grade
- Subject
- Science
- Topic
- The Human Body
- Difficulty
- Level 2 · Standard
- Estimated time
- 40 minutes
- Curriculum
- Texas grade levels (TEKS)
- Questions
- 15
- Answers
- Included, with working
- Format
- PDF (A4), print or complete online
Students will practice
- naming the parts of the heart and their functions
- tracing the path of blood through the double circulation
- comparing arteries, veins and capillaries
- describing the components of blood
- calculating heart rate and cardiac output
Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.
What's next?
Completed: The Circulatory System: The Heart, Blood Vessels and Blood
How to use this worksheet
- Print the PDF or complete it on screen. Write the student's name and date at the top.
- Read the instructions for each part together before starting. Encourage working to be shown.
- Mark with the answer sheet. Use the model answers and success criteria as a guide rather than a single right answer.
- Record the score, celebrate what went well, then follow the "What's next" suggestion.
Common questions
Who is this worksheet for?
8th Grade students (typically ages 13–14) working on the human body. It is pitched at level 2 · standard.
Are the answers included?
Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.
How long does it take?
About 40 minutes for 15 questions. Short, regular sessions work best: two or three a week beats one long one.
Do I need to sign up to download?
No. Click Download Free PDF and it opens immediately. It is free for personal, classroom and homeschool use.
What should we do next?
Try Nutrition: Nutrients, Food Tests and Energy in Food.
Preview
Success TutoringWorksheets8th Grade · Science · The Human BodyThe Circulatory System: The Heart, Blood Vessels and Blood
Name
Date
Score /
Arteries carry blood Away from the heart; veins carry blood back In to the heart.
Part A: The heart
The heart is a muscular pump with four chambers. The upper chambers, the atria, receive blood. The lower chambers, the ventricles, pump blood out. Valves stop blood flowing backwards.
The right side receives deoxygenated blood from the body through the vena cava and pumps it to the lungs through the pulmonary artery. The left side receives oxygenated blood from the lungs through the pulmonary vein and pumps it to the body through the aorta.
1.Put these in order to show the path of blood, starting from the body: lungs, right atrium, left ventricle, right ventricle, left atrium, aorta. (answer space)
2.Which chamber of the heart has the thickest muscular wall?
- ARight atrium
- BLeft atrium
- CRight ventricle
- DLeft ventricle
3.What is the job of the valves in the heart?
- ATo make the blood red
- BTo stop blood flowing backwards
- CTo add oxygen to the blood
- DTo slow down the heart rate
4.The pulmonary artery carries deoxygenated blood from the heart to the lungs. ☐ True ☐ False
5.Humans have a double circulation. Explain what this means. (answer space)
6.Which blood vessel carries oxygenated blood from the heart to the body?
- AVena cava
- BPulmonary artery
- CPulmonary vein
- DAorta
7.The pulmonary vein carries oxygenated blood. ☐ True ☐ False
Part B: Blood vessels and blood
8.Match each blood vessel or blood component to its description.
- Artery
- Vein
- Capillary
- Red blood cell
- White blood cell
- Platelet
- Plasma
- Helps blood to clot at a wound
- Wall one cell thick, where substances are exchanged with cells
- Thinner walls and valves; carries blood back to the heart at low pressure
- Defends the body against pathogens
- Thick, elastic walls; carries blood away from the heart at high pressure
- Liquid that carries dissolved food, carbon dioxide and wastes
- Contains hemoglobin to carry oxygen
9.Why are capillary walls only one cell thick? (answer space)
10.Veins have valves but most arteries do not. Suggest why. (answer space)
Part C: Heart rate
Each heartbeat sends a pulse of blood through the arteries, which you can feel at your wrist or neck. Heart rate is measured in beats per minute (bpm). To save time, count for 15 or 20 seconds and multiply up to one minute.
11.A student counts 18 pulse beats in 15 seconds. Calculate her heart rate in beats per minute.
12.Another student counts 25 beats in 20 seconds. What is his heart rate?
Preview — the PDF contains the full resource and answer sheet.
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About this resource
- Created by
- Success Tutoring Science Team
- Last reviewed
- 1 October 2026
- How it was made
- Written by our team
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