Why do we breathe?

By the end of todays activities I will… Know the anatomy as well as the function of the respiratory system. Know the aerobic respiration equation. I will…. Be able the label a diagram of the respiratory system. Explain what reparation is and the process in how we breath. Be able to write and explain the aerobic respiration equation. Tasks Notes Reparation relay Worksheet DVD

Lungs are the organs of respiration. The right lung is a little bigger than the left lung. This the left lung has to fit around the heart making it slightly smaller. The lungs are split into lobes The left lung is split into 2 lobes while the right lung is split into 3 lobes. Lungs have a very spongy texture and have a large surface area.

Trachea Lung Diaphragm Ribs Alveoli Intercostal Muscles Bronchi Bronchioles

The movement of air into and out of your lungs The process by which oxygen and carbon dioxide move between the lungs and the blood.

The process by which you take IN oxygen and give OUT carbon dioxide. When you breathe in: Your diaphragm goes down Your ribs expand Lungs get bigger When you breathe out: Your diaphragm goes up Your ribs move inwards Lungs get smaller

The alveoli are adapted to make gas exchange in lungs happen easily and efficiently. Features of the alveoli that allow gas exchange They have moist, thin walls (just one cell thick) They give the lungs a really big surface area They have a lot of tiny blood vessels called capillaries.

The movement of Air Enters through nose and mouth Air enters pharynx (cavity in throat connects nose and throat to oesophagus) Pharynx has a flap that prevents air entering the oesophagus called the epiglottis Air then enters the trachea (windpipe) – held open by rings of cartilage – Lined with cilia that move in waves removing dust, mucus and bacteria from the lungs

The movement of Air At the end of the trachea there are two large tubes called the bronchi that lead to each lung Each bronchus branches into smaller tubes called bronchioles Which then branch out into alveoli – Walls of alveoli are one cell thick, covered with a fine layer of water. – Alveoli are responsible for the transfer of oxygen into the blood.

The gases move by diffusion. Diffusion is the process by where gases move from a high concentration to a low concentration: Oxygen diffuses from the air in the alveoli into the blood. Carbon dioxide diffuses from the blood into the air in the alveoli. Capillary

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List 3 ways that the lungs are adapted for gas exchange. Capillary

The passage of air through the body: The lungs are positioned inside the ………….. …………….. The ………… form a cage protecting them. The ………..lung has ………… cavities is bigger than the ………… lung which only has ……….. The action of breathing means that the lungs are constantly moving in and out. In order to prevent friction, the lungs are surrounded by the ………………. ………………… This is a complete lining which is smooth and has a moist, slimy mucus. two three right left chest cavity pleural membrane

How is digested food used by the body? Glucose, from digested carbohydrates, is an important substance that contains stored chemical energy. This is released when it reacts with oxygen in cells. The energy is used in many ways, such as for: The body needs a constant supply of energy which comes from digested food. enabling muscles to contract keeping warm in mammals and birds building new molecules, cells and tissues.

What is respiration? Respiration is the process that the body uses to release energy from digested food (glucose). This type of respiration is called aerobic respiration because energy is released in the presence of oxygen. How do the glucose and oxygen needed for aerobic respiration get to the all the body’s cells? oxygen carbon dioxide glucose ++  water ( energy) + from the digestive system from the respiratory system waste product (exhaled)

What do you notice about these two equations?

Plants respire too! glucose + oxygen Water + carbon dioxide (+ energy) ReactantsProducts Aerobic respiration (uses oxygen) Happens all the time Overall plants produce more oxygen by photosynthesis than they use by respiration YouTube - Plant Physiology: Respiration (Britannica.com)

Research two disease that effect the heart and two diseases that effect the lungs. For each disease; -provide the symptoms -provide a description on how it effects the heart or lungs -for one of the disease create an awareness poster.

By the end of todays activities I will… Know the anatomy as well as the function of the respiratory system. Know the aerobic respiration equation. I will…. Be able the label a diagram of the respiratory system. Explain what reparation is and the process in how we breath. Be able to write and explain the aerobic respiration equation. Tasks Notes Reparation relay Worksheet DVD