Syllabus+Quesions+-+rachel

· tracheal tubes · Air sacs · Spiracles || · Pulmonary system (lungs) · Bronchi · Bronchioles · alveoli || · gills (on either side of pharynx) · gills are made of filaments (contains capillary network which transports oxygen and carbon dioxide) || · breath through their skin · oxygen passes through the skin (used when in hibernation) · also use lungs to breath ||
 * || INSECT || MAMMAL || FISH || FROG ||
 * exchange surface || · Skin

3. Cells require nutrients in order to survive. They therefore need a transport system in which they receive these nutrients. Transport systems are very important in multi-cellular organisms as they are essential in providing cells with nutrients they need to survive. If multi-cellular organisms didn’t have transport systems they wouldn’t be able to access their necessities such as oxygen and water. Transport systems also are essential in disposing of waste produced by the organism in order to provide a stable internal environment.