Internal Transport S ystem. SBI 3UO. Function. To circulate necessary materials to all of the cells in the body e.g. Oxygen To remove the waste products of cell metabolism To regulate body temperature To carry materials e.g. Hormones and antibodies to various organs
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See fig. 12.1 pg. 479
Complete worksheet – Double circulatory system (pg. 483, fig. 12.7)
Live Beating Heart surgery
SinoatrialSVnode – right atrium – rhythmic signals that causes atria to contract
Atrioventricular AV node – between atria and ventricles (signal reaches AV node through the specialized bundles – bundles of His Purkinje fibres initiate contraction of right and left ventricles
- Label the parts of the heart (pg. 480 fig. 12.2)
- Draw the cross-section of the human heart (pg. 481 fig. 12.3)
2 Nerve cords 1. through spinal cord (carries stimulus to beat faster)
2. vagus nerve (inhibitor, causes to beat slower)
Pacemaker right atrium
• Your heart beats 100,000 times a day.
• Your heart beats 2 billion times in your lifetime!
• Blood cells are formed in your bone marrow.
Once upon a time... Life - The tiny platelets (1 of 3) http://www.youtube.com/watch?v=JvOH5skxqoA&feature=fvwrel