P5 Science
Human Body as a System
This science revision note aims to help your child understand the human body as a system topic.
Take note of how the human body systems work together (and how examiners test your understanding of this topic).
You would’ve noticed the P5 topic of the respiratory system is combined with the P3/P4 topic of human body system.
But before you read on, you might want to download this entire revision notes in PDF format to print it out for your child, or to read it later.
This will be delivered to your email inbox.
Question 1:
[From the Anglo Chinese School (Primary) P5 2022 SA2 Q36)]
The diagrams show the respiratory systems of a human and a fish.
(a) Name organs X and Y of the human and fish respiratory system. State how the structures covered with many blood vessels in the human and fish respiratory system help in the absorption of oxygen.
STEP 1: Recall
Identify the keywords in the questions:
- Respiratory system
- Many blood vessels
STEP 2: What Science topics are tested?
1. Recognise and identify the different parts of the respiratory system.
2. Name the functions of the various parts of the respiratory system.
Human
- Lungs: carry out gaseous exchange with the surrounding
- Windpipe: connects the nose to the lungs and allows air to flow to and from the lungs
Fish
- Gills: numerous filaments to increase the surface area for the exchange of gases
Refer to this video:
Step 3: Piecing your answer together
(a) Name organs X and Y of the human and fish respiratory system. State how the structures covered with many blood vessels in the human and fish respiratory system help in the absorption of oxygen.
Answer
X is the lung while Y is the gill. Numerous blood vessels help to increase the surface area of contact between the blood and oxygen to increase the rate of absorption of oxygen.
(b) Describe how oxygen in the environment reaches the blood vessels of the human respiratory system.
STEP 1: Recall
Identify the keywords:
- Oxygen in environment
- Blood vessels
This topic is testing on the path that oxygen travels after being taken in.
STEP 2: What Science topics are tested?
1. Recognise the path that oxygen takes.
Nose –> Windpipe –> Lung –> Blood
Refer to this video:
STEP 3: Piecing your answer together
(b) Describe how oxygen in the environment reaches the blood vessels of the human respiratory system.
Answer
The oxygen in the surroundings enters the nose and down the windpipe. The oxygen then enters the lungs and is absorbed into the blood vessels.
Common mistake:
Wrong answer: The oxygen enters the nose and is absorbed into the blood vessels.
That answer is incomplete. You need to outline the full path that oxygen takes.
Question 2:
[From the Anglo-Chinese School (Primary) P3 2022 SA2 Q29)]
Study the diagrams of organ systems of the human body.
(a) Name organ systems T and U. Label the part in system U that protects the heart.
STEP 1: Recall
Identify the keywords:
- System
- Organ
Recall the differences between an organ and a system.
STEP 2: What Science topics are tested?
1. Recognise the systems and their functions.
- Muscular system: pull on bones to move different parts of the body.
- Circulatory system: transport substances in the blood around the body.
- Skeletal system: gives the body its shape and protects vital organs
2. Identify the functions of various parts of the body system.
-
- Skull: Protects the brain
- Ribcage: Protects the heart and the lungs
- Heart: To pump blood to various parts of the body
Refer to this video:
STEP 3: Piecing your answer together
(a) Name organ systems T and U. Label the part in system U that protects the heart.
Answer
T: muscular system
U: skeletal system
(b) Tick the correct statement that shows the similarity in functions between system U and the stem of a plant
STEP 1: Recall
Identify the keywords:
- Similarity
- System U of human vs stem of plant
STEP 2: What Science topics are tested?
Refer to the part (a)
STEP 3: Piecing your answer together
(b) Tick the correct statement that shows the similarity in functions between system U and the stem of a plant
Answer
Statement 1: Both work together with the muscular system
Plants do not have a muscular system. Therefore, this statement is not correct.
Statement 2: Both support and keep the living thing upright
This statement is correct. The skeletal system supports the body and gives the body its shape. The stem holds the plants upright, allowing the leaf to reach towards the sun to obtain maximum sunlight.
Statement 3: Both absorb water to keep the living thing alive
The skeletal system does not absorb water, neither does the stem. The root absorbs water and mineral salts from the soil.
You can download this revision note so your child can revise them anytime.
This will be delivered to your email inbox.
Click here for other primary science revision notes >>> https://scienceshifu.com/primary-5-science-revision-notes/
Click here for other primary science revision notes >>> https://scienceshifu.com/primary-6-science-revision-notes/
Purchase this P3 P4 Science Revision Guidebook for your child
Included inside this ebook:
– Over 120 pages of detailed science concepts provided
– 14 challenging exam-based questions for your child to apply the science concepts.
– Detailed explanation videos of 6 exam-based questions
Click on the button below to find out more about this ebook
Subscribe To Our
Pre-Recorded Science Courses
When you sign up for the Pre-Recorded Courses, your child receives the following:
– Learn the science concepts anytime, anywhere – There are lots of recorded videos and lesson notes to learn and revise the science concepts and answering techniques. Submit the assignments from ScienceShifu and our team of science specialists will mark and reply in 3 to 4 days’ time.
– 24/7 homework helper – Simply take a picture of the question that your child is unsure of and Whatsapp our homework helpline. Our team of science specialists will reply within 1 day.
Click on the button below to find out more about our pre-recorded courses
Enrol your child to
the All-In-One ‘Eureka!’ Program
When you sign up for the All-In-One ‘Eureka!’ Program, your child receives the following:
- Live Zoom Classes conducted by our passionate teachers.
- EdaptIQ™ – a smart digital assessment book (An adaptive learning platform to customise quizzes and practices to suit your child’s strengths and weaknesses. We have thousands of exam-based MCQs for your child to practise).
- 24/7 homework help – Simply take a picture of the question that your child is unsure of and Whatsapp our homework helpline. Our team of science specialists will reply within 1 day.
Click on the button below to find out more about our program
Join the ScienceShifu Channel to get the latest learning tips.
Benefits of joining ScienceShifu on Telegram:
– Be the first to receive science revision notes from us
– Receive special promotions on all our online courses.
Click on the button below to join the ScienceShifu channel:
Follow the ScienceShifu Instagram Channel to learn more science concepts
Benefits of joining Instagram:
– Watch out for interesting posts from ScienceShifu explaining science concepts
– Short videos where I will be going through past year exam questions
Click on the button below to follow the ScienceShifu Instagram Channel:
Talk again soon!
Andy Ling – Founder of ScienceShifu.com
Guiding your child to be the master of science concepts
Download our free revision notes to help your child prepare for the crucial exams.
Be part of our mailing list to receive the latest offers and learning tips from us.
