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The Circulatory or CardioVascular System

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  • The Circulatory or CardioVascular System

The Circulatory or CardioVascular System

  • Date December 3, 2020
Science Skills – Grade 6 The Circulatory or CardioVascular System


 
The cardiovascular system delivers nutrients throughout the body. The three main components of the cardiovascular system are the heart, blood vessels, and blood. Blood is what keeps the rest of our body alive. It must be continuously pumped through the body by the heart. Blood carries nutrients and oxygen to cells in our body.

Circulation

Blood circulates constantly through our entire body. As it passes through our body it picks up nutrients from our food and drops them off to cells that need them. It also picks up oxygen from our lungs and drops it off at cells to be used for energy. The blood then picks up waste carbon dioxide from the cells and drops it off at the lungs for us to breathe back out.

http://localhost/dca/wp-content/uploads/2020/04/Circulatory-System-Cardiovascular-System-Facts-Functions-for-Kids.mp4


Blood Vessels

Blood vessels are tubes throughout our body that carry the blood. There are two main types of blood vessels: arteries and veins. Arteries carry blood from the heart to the rest of the body. Arteries have to be thick and strong as there is more pressure on them from the heart. When you feel your pulse, this is from an artery. Veins carry used blood back to the heart. They don’t need to be as thick.

What is in blood?
http://localhost/dca/wp-content/uploads/2020/04/Human-Blood-Lesson-for-Kids.mp4


Over half of blood is made up of red blood cells carrying oxygen. This is why blood looks red. There are also white blood cells which kill germs and keep the blood clean. Blood also has something called platelets which help the blood to clot when you get a cut. Finally, all these cells float in a watery substance called plasma.

The Heart

The heart is a large organ about the size of your fist. It sits in your rib cage just to the left of the center of your chest. The heart is made of a lot of muscle that pumps blood through our bodies. Veins bring blood to the heart to pump back out again on arteries. The main artery leaving the heart is called the aorta. In order for blood not to go backwards, there are valves to make sure the blood only gets pumped in the correct direction. There are four sets of valves in the heart.


The heart has two main pumps. One sends the blood throughout the body, while the other sends blood from the veins up to the lungs to drop off carbon dioxide and pick up more oxygen.

The heart beats at different rates depending on what the body is doing. If you’re just sitting around, it will beat slowly. If you are running fast, the heart will beat faster to get oxygen to your muscles.

What are blood types?

There are four main blood types: A, B, O, and AB. Each blood type is slightly different and has different antibodies and antigens. It’s important that blood donors have matched blood types or a person can get very sick.

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TERM 1 UNIT 1: THE ENVIRONMENT18 In this Unit, students will learn about climate change, its effects and ways of stemming it. They will explore the nature of solid waste pollution, and identify ways in which this problem can be alleviated. In addition, they will study the causes of soil degradation, the methods of preventing soil degradation, and appreciate the importance of caring for the environment.
The Environment
Ecosystems and Biomes
HomeWork – Ecosystems – September 15, 2020
Conservation – Caring for the environment
Human Activities and their effects on the environment
Review Questions – September 24, 2020
Environmental problems – Climate Change
The Greenhouse Effect
Solid Waste Management
Let’s reduce solid waste
Soil Degradation
Soil Eroision
Homework – October 9, 2020
Man-made causes of soil erosion and how we can prevent it
Soil Types
Science project 1
Science Project 2
Science Project 3
TERM 1 UNIT 2: LIGHT AND SOUND7 In this unit, students will investigate the nature of light and sound energy, and how they interact with various materials. They will identify sources of noise pollution, note the harmful effects on humans and be aware of mitigation strategies.
Light
Homework – Review of Light
TERM 2 UNIT 2: HUMAN BODY SYSTEMS3 In this Unit, students will learn about selected human body systems. Through observations, demonstration and research they will identify the organs associated with each system and state their functions. Range of Content • The main structures and functions of selected human body systems  Circulatory system (Heart, blood, blood vessels). The main job of the circulatory system is the transporting materials throughout the body. It carries nutrients, oxygen and water to different parts of the body and removes waste.  Digestive system (mouth, oesophagus, stomach, small intestine, large intestine). The digestive system helps to break down food into a form that the body can find useful.  Excretory system (kidney, bladder, skin, lungs). Substances that may be harmful to the body are removed through the excretory system.  Nervous system (brain, spinal cord, nerves). The nervous system controls the body's actions.  Reproductive system (penis, testes, vagina, ovary, uterus/womb). The reproductive system is responsible for producing offspring.  Respiratory system (nose, trachea, lungs). The respiratory system produces energy from food.  Skeletal and muscular systems (muscles, bones, joints). The muscular and skeletal systems work together to help the body to move. The skeletal system also protects major organs throughout the body.
Light – Reflection Refraction and Absorption
Mirrors
Sound
Review of Light – Quiz – November 20, 2020
Review of sound – December 2, 2020
TERM 2 UNIT 1: MATERIALS PROPERTIES AND USES1 In this unit, students continue to learn about the names, properties and uses of everyday materials begun at the lower grades, are clear about safety at all times, and recognise that materials are handled, stored and disposed of in different ways depending on their properties. Students will plan investigations; including controlling variables where appropriate e.g. fair tests. Students will differentiate between reversible and irreversible changes. They will evaluate, through investigations, whether or not particular changes are reversible. They will assess the usefulness of some reversible and irreversible changes in everyday situations.
Properties and use of selected materials
TERM 2 UNIT 3: MIXTURES1 In this unit, students will learn that substances can be combined to form mixtures. They will classify mixtures according to their properties. They will learn to work cooperatively and develop problem solving skills as they investigate specific methods of separating mixtures. Range of Content • Substances combine to form mixtures • Types of mixtures include solutions, suspensions, and colloids • Mixtures can be physically separated based on size of particles, magnetic properties and how readily they dissolve • Methods of separating mixtures include filtration, evaporation, sieving, and decanting
Digestive System
The Circulatory or CardioVascular System
Respiratory System
Classifying Mixtures
TERM 3 LESSON 1 _ NUTRITION AND DRUGS
April 28, 2020
TERM 3 LESSON 2 - APRIL 29, 2020
Class Activity – Drugs and Awareness – April 29, 2020
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