KINE 3012 Lecture 11: lecture 11 feb 4.pdf
30 Dec 2014
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Blood transports things *learned in chapter before* Regulates temperature, warm blood from the core travels to other parts of the body. Pulmonary system, heart --> lungs --> heart *low pressure* Arterial system, 11% of our blood, high pressure system. Venous system, 60% of our blood, low pressure system after goes through organs. Ability to change pressure because of muscle contraction. Valves that allow the control of blood flow which are only 1 way. Opened by different pressures on both sides of the valve. Valve close (low pressure low pressure) *atrium contract. Fibrous rings, stability and structure because exposed to high pressures. Right av, tricuspid valve, left av bicuspid valve. Similar to skeletal muscles, but skeletal muscles contract as a group. Making the heart smaller, decreases volume, increases pressure. Gap junction, allows ion transfer which allows changes in membrane potential. Depolarization can continuously transfer onto the next cell and cause contraction.
