HLTC22H3 Chapter 6: chapter 6
Document Summary
Chapter 6: aging of the internal organ systems. Cardiovascular system: cardiovascular system = main transportation system. Supplies tissues with fluids, hormones, oxygen and nutrients and removes waste products (carbon dioxide and hydrogen ions: blood = complex fluid composed of water, red and white blood cells, platelets, nutrients such as fat globules, carbs and proteins. Blood also carries electrolytes to help maintain the acid/base balance and a host of other chemicals: heart = located behind the chest wall somewhat to the left of the sternum/breastbone. It"s enclosed in a fibrous sac the pericardium . The left and right side of the heart each have two upper chambers (atria which have thin walls) which collect the blood and two lower chambers (ventricles. Skeletal muscle movement puts pressure on the vein to keep the blood moving: the heart alters its rate of pumping depending on both external and internal demands.
