Critical Question 1  Circulatory and Respiratory System.notebook

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Heading: Respiratory System

· The respiratory system has a major role to play in movement through its supply of oxygen to the working muscles

· Respiration is the process by which the body takes in oxygen and removes carbon dioxide. 

https://www.youtube.com/watch?v=hc1YtXc_84A

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Define these terms and their role in respiration for homework

https://www.youtube.com/watch?v=hc1YtXc_84A

Critical Question 1  Circulatory and Respiratory System.notebook

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Sub:Lung FunctionInspiration is breathing in. The diaphragm contracts, the ribs move up and out a little which enlarges the chest cavity. Because the chest is bigger, the pressure within the lungs decreases. The air moves from an area of high pressure to low pressure so the air is drawn into the lungs.

Expiration is breathing out. The diaphragm and ribs return to their atrest state which decreases the size of the chest cavity. Thus the pressure inside the lungs is now high, so air is forced out of the lungs.

Critical Question 1  Circulatory and Respiratory System.notebook

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Sub: Exchange of Gases

External (pulmonary) respiration - This is the exchange of oxygen and carbon dioxide between the alveoli and the blood capillaries (into your blood). It results oxygenated blood

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Internal (Tissue) Respiration - This is the exchange of oxygen and carbon dioxide between the blood stream and tissue cells (e.g. muscles).

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Heading: Circulatory System

The circulatory or cardiovascular system consists of the;· Heart· Blood vessels· Blood

The major function of the circulatory system is to transport nutrients, oxygen and water to the bodies cells and remove waste products. This is called circulation.

www.youtube.com/watch?v=_lgd03h3te8

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Sub: Function of BloodBlood makes ups 8% of your total body weight. Males on average carry 5-6 L and females on average 4-5 L.

Blood has 3 functions: 1.Transportation of oxygen, carbon dioxide and nutrients2.Regulation of pH levels and body temp3.Protection against blood loss through clotting and

antibodies to protect against foreign toxins e.g. virus

http://www.youtube.com/watch?v=_lgd03h3te8

Critical Question 1  Circulatory and Respiratory System.notebook

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Sub: Components of Blood 

· Blood consists of a liquid component (55 %) called plasma and a solid component (45%) made up of red and white blood cells and platelets.

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· Plasma - A straw coloured liquid which is 90% water. It also contains waste products, nutrients, hormones and enzymes.

· Red blood cells - Contains oxygen carrying haemoglobin. RBC's are formed in the bone marrow.

· White blood cells - (leukocytes) They fight infections (immune system). Also formed in bone marrow.

· Platelets - Help repair blood vessels and promote blood clotting.

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Heading: Structure of the heart

Label the heart for homework

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Heading: Structure of the heart

Critical Question 1  Circulatory and Respiratory System.notebook

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Dont' Copy  Hearts beats

www.youtube.com/watch?v=oE8tGkP5_tc

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Sub: Blood Flow direction 

http://www.youtube.com/watch?v=oE8tGkP5_tc

Critical Question 1  Circulatory and Respiratory System.notebook

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Sub: Arteries, veins, capillaries

Arteries have thick muscular walls that carry the blood away from the heart at high pressure. The major artery of the body is the aorta.

Capillaries are the smallest blood vessels. They have very thin walls through which nutrients are exchanged.

The veins return blood back to the heart. Because the blood is not under much pressure at this stage, the walls of veins are not as muscular as those of arteries. Veins also have valves that stop the blood running backwards.”

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Sub: Pulmonary and Systemic Circulation

Both sides of the heart work together like two pumps with overlapping circuits. These circuits are referred to as Pulmonary and Systemic Circulation.

Pulmonary circulation (deoxygenated blood) is the flow of blood from the heart to the lungs and back to the heart.

Systemic circulation (Oxygenated blood) is the flow of blood from the heart to body tissue and back to the heart.

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Sub: Blood Pressure This is the pressure exerted by the blood on the wall of a blood vessel. Is is measured by a Sphygmomanometer.

Blood pressure is measured in two forms:· Systolic Systolic pressure is the highest (peak) pressure recorded

when blood is forced into the arteries during contraction of the left ventricle.

· Diastolic Diastolic pressure is the minimum or lowest pressure recorded when the heart is relaxing and filling (diastole).

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Content/writing space

1. Outline the 5 types of bones giving examples (3 marks)

2. Classify the different types of Synovial joints using an example and outline what action/movement they can perform. 

3. Describe the 3 types of muscle fibres using examples (3 marks)

4. Describe how muscles work together to produce movement. Use the example of the lift phase of the bicep curl to help (4 marks)

5. Describe the three types of muscular contractions and provide an example of each. (3 marks)

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Content/writing space

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Critical Question 1  Circulatory and Respiratory System.notebook

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