HS 130 Unit II Seminar Option II
The heart is the organ that supplies blood and oxygen to all parts of the body and is connected with the circulatory system. It pumps blood throughout the blood vessel by contractions. The male’s heart weight between 9 and 11 ounces and the female’s heart weighs about 11 to 12 ounces (Bradley, 2013). A person’s blood pressure has major effects on their heart where high blood pressure is a major risk factor for a heart attack. When the heart isn’t receiving enough oxygen a person will develop chest pains, known as angina where the blood flow is blocked, and results in a heart attack (Casey, 2013). The blood flows through our heart in a series of different steps and factors. Oxygen flows into the heart through the right atrium where at this time the tricuspid valve is closed, allowing the blood to fill the right atrium. Next, the muscle walls of the right atrium contract and push the blood through the tricuspid valve into the right ventricle. Once this occurs the right ventricle contracts and pushes the blood through the pulmonic valve into the pulmonary artery. The oxygen rich blood is then returned from the lungs to the left sides of the heart and into the left atrium. The contract of the muscle of the left atrium pushes the blood out into the left ventricle. Finally once the left ventricle fills with blood the muscle walls contract pushing blood into the aorta and throughout the body (Thibodeau, 2008). Homeostasis is your body’s ability to maintain an internal environment that is constant, no matter what is happening outside of it. The body has a lot of responsibility, like blood pressure, temperature, and things like glucose levels even. Blood pressure can be regulated through homeostasis (Thibodeau, 2008). Homeostasis hinders organs from exerting so much, thereby preventing disturbance to metabolism and other physiological conditions of the body. So, when the body’s blood pressure is high, or even low,...
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