BI227 Anatomy and Physiology with Review 2 McKenzie Brown
Review of Journal Article March 6, 2014
Our cardiovascular system is composed of the heart and blood vessels. The main purpose of this system is to transport substances throughout the body. Even though transportation is the main function of the cardiovascular system, it is not the only function. Along with transportation we have protection and regulation.
Transportation has many roles in the cardiovascular system. First, our blood carries oxygen from our lungs to all of our tissues. While taking oxygen to our tissues, it also picks up carbon dioxide from them and takes it to our lungs to be removed from our body. Second, it delivers nutrients from our digestive tract to all of our body’s tissues. Third, it takes waste to our kidney’s to be removed from our body. Fourth, it takes hormones to their target cell from the endocrine cells. Last, it transports stem cells from our bone marrow to tissues where they mature and lodge.
Protection is the second function of the cardiovascular system. First, in order to limit the spread of infection our blood helps with inflammation in the body. Second, our white blood cells get rid of any microorganisms or cancer cells in our system. Third, to neutralize toxins in our body our blood proteins and antibodies help eliminate pathogens. Fourth, to initiate blood clotting we need platelets. This helps minimize blood loss in the long run.
Regulation is the third function of the cardiovascular system. First, by absorbing or giving off fluid our blood capillaries help stabilize the fluid distribution in our body. Second, blood proteins stabilize our extracellular fluid, electrolytes, and pH by buffering bases and acids. Third, movement in our blood flow helps regulate blood pressure and body temperature. To conserve heat we retain blood deeper in our body. By routing blood to the skin, our body is needing heat loss.
The Cardiovascular System is composed of our heart, arteries, and veins. The two important tissues of the Cardiovascular System are blood and capillaries. Arteries are made up of less elastic tissue and more smooth muscle and carry blood away from the heart to our body. Veins are made up of more elastic tissue and less smooth muscle and carry blood to the heart from the body. The heart wall has three layers that surround the heart. The outer most layer is the epicardium, middle layer is the myocardium, inner layer is the endocardium.
The main purpose of this article is to see what factors can contribute to the risk of induced Hypertension and Preeclampsia during a pregnancy. This article states that Preeclampsia and Hypertension can cause maternal morbidity. In this article they assess the exposure to chemicals or a physically demanding workload to...