The Circulatory System and the Heart B3 2 Transporting Materials
The Circulatory System and the Heart B3 2 Transporting Materials.
Dec 22, 2015
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- Slide 1
- Slide 2
- The Circulatory System and the Heart B3 2 Transporting Materials
- Slide 3
- Requirements 11.2.1 Dissecting boards Dissecting scissors Gloves Aprons Newspaper/bags for disposal Safety specs White trays Waterproof pens Laminated cards Alternative cut out activity for those not wanting to do dissection, scissors, colours and glue
- Slide 4
- Objectives Students should learn: there are two separate circulation systems that the heart pumps blood to the organs via the arteries and the blood returns to the heart in the veins that in the organs, materials needed by the cells pass out of the blood and materials produced by the cells pass into the blood.
- Slide 5
- Outcomes Most students should be able to: describe double circulation in humans describe the action of the heart and the functions of the different blood vessels associated with it. Some students should also be able to: explain the benefits of a double circulation.
- Slide 6
- Specification The circulatory system transports substances around the body. [B3.2.1 a)] The heart is an organ and pumps blood around the body. Much of the wall of the heart is made from muscle tissue. [B3.2.1 b)] There are four main chambers (right and left atria and ventricles) of the heart. [B3.2.1 c)] Blood enters the atria of the heart. The atria contract and force blood into the ventricles. The ventricles contract and force blood out of the heart. Valves in the heart ensure that blood flows in the correct direction. Blood flows from the heart to the organs through the arteries and returns through the veins. There are two separate circulation systems, one for the lungs and one for all other organs of the body. [B3.2.1 d)]
- Slide 7
- Workbook Homework Questions on p. 109 - 110
- Slide 8
- Human circulatory system A circulatory system consists of a group of organs that assist the movement of substances, such as oxygen and glucose, around the body. Humans and other complex organisms have a closed circulatory system where blood is contained within a series of vessels. This allows the speed, pressure and distribution of blood to be controlled.
- Slide 9
- Why do you need a Circulatory System? There are billions of cells in your body and most of them are too far away from a direct source of food or oxygen A transport system is vital to supply the needs of your body cells and remove the waste materials they produce This is the function of your blood circulation system. It has three main parts: The Blood Vessels The Heart The Blood
- Slide 10
- Double Circulatory System
- Slide 11
- Write this in your notes Humans have two transport systems, called a double circulation. One carries blood from your heart to your lungs and back. This allows oxygen and carbon dioxide to be exchanged with the air in your lungs. The other carries blood around the rest of your body and back again to the heart.
- Slide 12
- Video on following slide The American man on the video pronounces the word capillaries incorrectly. Its not his fault. He cant help it. Click below to listen to how to say it: incorrectly and correctly
- Slide 13
- Slide 14
- What are the stages in the cardiac cycle?
- Slide 15
- Diagram of a Heart
- Slide 16
- Worksheet Get an unlabelled Heart Structure worksheet from the front and add the labels to it using your textbook p.235. Shade the left (right anatomically) side blue and the right (left anatomically) side red. Stick in the smaller information sheet below it, which looks like the one to the right:
- Slide 17
- 1 2 3 4 5 6 7 8 9 10
- Slide 18
- Slide 19
- Starter remember its drawn as if its in your chest when you hold it up Add these labels to the correct numbers Left atrium Right atrium Left ventricle Right ventricle Pulmonary artery Pulmonary vein Aorta Vena cava Cardiac muscle Using washable pen add the following to the heart diagram; Blue arrows to show where deoxygenated blood flows Red arrows for oxygenated flow
- Slide 20
- Labels (do not clean off!) 1.Aorta 2.Pulmonary vein 3.Left atrium 4.Valves 5.Left ventricle 6.Cardiac muscle 7.Right ventricle 8.Right atrium 9.Vena cava 10.Pulmonary artery
- Slide 21
- Slide 22
- Safety Apron Safety specs Cover cuts No chewing Care with sharp instruments Wash hands with soap at end
- Slide 23
- Heart Dissection 1.Identify the ventricles, atria, aorta, pulmonary artery, coronary arteries, and fat on the top of the heart 2.Work out which is the right ventricle (how?) 3.Cut through the wall of the right atrium with a pair of scissors to expose the inside 4.Note the thin wall and the hole at the bottom leading to the right ventricle 5.Cut through the wall of this and follow it down as it curves around the heart 6.Open the heart from the side. Look at the tendons attached to the valves 7.Look at the muscular right ventricle wall and using a seeker or your finger show where it exits (the pulmonary artery) 8.Repeat the above with the left atrium and ventricle 9.Find where the left ventricle exits to the aorta. 10.Cut through the aorta to expose the semilunar valves, notice the thickness and elasticity of the aorta. 11.Try to identify the coronary artery running back into the heart muscle by lifting the semilunar valves with the seeker. 12.Finally try and expose the semilunar valves in the pulmonary artery.
- Slide 24
- artery atrium ventricle fat Coronary artery
- Slide 25
- Left atrium Aorta Valve (atrioventricular) Valve (semi lunar) Tendon (heart string ) Left ventricle Cardiac muscle
- Slide 26
- Slide 27
- Plenary How many of the labels did we see? Did we see anything else not labelled?
- Slide 28
- Extension - Questions 1.Name the system which transports things around our bodies. 2.Is the heart a tissue or an organ? 3.What is the heart made from (mostly)? 4.How many chambers in a heart? 5.What type of blood vessel brings blood to the heart? 6.Which chamber does blood enter first? 7.How is blood moved to the ventricles? 8.Why doesnt blood flow back to the atria? 9.Where does the blood go when the ventricles contract?
- Slide 29
- Specification The circulatory system transports substances around the body. [B3.2.1 a)] The heart is an organ and pumps blood around the body. Much of the wall of the heart is made from muscle tissue. [B3.2.1 b)] There are four main chambers (right and left atria and ventricles) of the heart. [B3.2.1 c)] Blood enters the atria of the heart. The atria contract and force blood into the ventricles. The ventricles contract and force blood out of the heart. Valves in the heart ensure that blood flows in the correct direction. Blood flows from the heart to the organs through the arteries and returns through the veins. There are two separate circulation systems, one for the lungs and one for all other organs of the body. [B3.2.1 d)]
- Slide 30
- Workbook Homework Questions on p. 109 - 110
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