Michelle Koo's Anatomy and Physiology Blog

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Thursday, November 17, 2016

Wellness Day Reflection

Link to our: Tai Chi Presentation

      Carolyn Chen and I decided to choose Tai Chi as our Wellness Day topic because we were both not very knowledgeable or experienced in the art and wanted to explore more about its physiological benefits and its relation to our Chinese culture. I was also intrigued to learn more because I know quite a few people who participate in this slow-moving activity and I wanted to see how the culture connected to the physical aspects. Carolyn’s dad had some DVD tutorials of Tai Chi lessons, and he himself had experience doing Tai Chi, so we ended up gaining a lot of knowledge from both a professional Tai Chi instructor and from a two-on-one in person lesson. Since many of the students in our class didn’t have much understanding of the Tai Chi, some only from middle school PE, we thought it would be informative to teach the class some background information on Tai Chi history and provide studies to show its physiological benefits. 
      What surprised me the most during this learning process was how Tai Chi moves were based off martial arts. Carolyn’s dad demonstrated and explained how one of the main moves was from a martial arts move to attack an opponent. After understanding what the moves originated from, I found it easier to grasp the Tai Chi moves and appreciate its slow pace. Carolyn and I decided it would be informational and interesting to show the class this defense move while we were teaching the segment. Another interesting aspect I learned was the stressed importance of connecting to nature and animals. I thought this went along well with the current idea of mindfulness and how we can allow our mind to calm and focus on our physical movements for relaxation. After doing the sequence multiple times, I noticed my body relax and I felt significantly more calm than before I started. I was surprised how many of the moves were named after animals such as “white crane spreads its wings”, and how the moves were mimics of animal characteristics.
      Tai Chi is important for health and fitness because it works out the entire body, through low impact movements. Core abdominal muscles are consistently used and there is a great emphasis on balance and flexibility. Some advanced moves require a lot of flexibility as the body has to stretch into low positions on the ground, yet still maintaining posture and grace. Stress plays a large role in our life; therefore, Tai Chi is beneficial for relieving stress and focuses on breathing. As the studies shows, Tai Chi helped increase college students’ information processing and aided in mental health focus for young adults. Our parasympathetic nervous system is induced, decreasing our overused sympathetic nervous system. Our body can pay attention to loosening its muscles and take time to breathe and be calm. Tai Chi done early also prevents joint problems, arthritis, and falling by actively strengthening our coordination and balance, slowing the deterioration of our bones when we get older. 
      On a scale of 1-10 I would rate our presentation a 9.5 because I think we provided informative background information on Tai Chi that helped students become aware of the culture behind the physical activity. By presenting studies on Tai Chi, we used concrete evidence of its physiological benefits and showed why people should take interest in Tai Chi and try it out. We also went over specific hand techniques that are crucial when doing Tai Chi and the class seemed thoroughly engaged in both our presentation and activity. One major goal in our presentation was to emphasis how Tai Chi can be beneficial for younger people and the exercise is not restricted to older people. I hope that people are inspired to learn more about Tai Chi and maybe have courage to go out and take a class!


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Tuesday, November 8, 2016

Unit 3 Reflection

      What was this unit all about? The unit first focused on the heart and it's physical features and how blood flows through the heart. In the second half of the unit, we discussed cardiovascular health in regards to the difference between a stroke and a heart attack, the circulatory system, the functions and dysfunctions in our blood vessels, components of blood, and how the respiratory system allows us to breath. To learn more in detail about the heart, please check out my Mid-Unit Summary. Visit our Heart Chalk Walk, to see our demonstration of the circulation of de-oxygenated blood traveling throughout the heart, into the lungs to become oxygenated, and then carried throughout the rest of the body. 


Image result for cardiovascular system
 Maintaining cardiovascular health allows our bodies to have apt circulation of blood through our arteries. Proper circulation in and out of our heart prevents from inhibited blood flow which may result in heart disease, such as atherosclerosis or a stroke. When blood flowing to the myocardium in severely slowed or stopped, heart cells may be damaged which could result in a heart attack. They are often caused by atherosclerosis, where excess sugars and polyunsaturated fats cause LDL also known as "bad cholesterol" to stick to damaged cells and turn into plaque. The plaque then clogs the blood vessel and hinder blood flow. A stroke occurs when blood flowing in arteries connected to the brain are interrupted. There are tow types of strokes: ischemic stroke and hemorrhagic stroke. Ischemic strokes are often caused by atherosclerosis and account for 80% of all strokes. 
     In terms of caring for my own cardiovascular health, I can avoid eating foods high in fats and oils, and inform people about the dangers of atherosclerosis. Being aware of my cardiovascular health at a younger age will greatly contribute to the prevention of heart disease and strokes in the future. 
      I want to learn more about the various removal methods for the plaque that gets built up during atherosclerosis. How effective is this surgery process and how do patients recover from the removal. I also want to investigate more on my blood type, as my parents have told me I am type O-, but they are not fully certain. Lastly, I want to look into patients who have suffered from stroke and see how they are coping and healing from the damage. Possibly even visit a care center and talk to those who have have suffered as well as the physical, speech and language therapists who are helping them learn to deal with their condition. 
Image result for stroke
    Throughout this unit, I found that I learn the best through thinking through the physical process, drawing out the diagrams, and studying through tactile means. The heart chalk activity really helped me understand the blood flow in the heart as we really had to think about each individual artery, vessel, and direction of the blood before drawing and modeling the process. I really enjoyed the heart dissection collaboration/video because it allowed all the members in the group to actively participate and think about each part of the heart in the packet. Since our heart was not clearly obvious which parts were which, talking it out with each other, finding pictures online, in our notebook, and from the diagrams; we were able to take prior knowledge we had and work collaboratively to figure out our sheep heart together.
     Reflecting back on my Unit 2 health goals, I have allowed myself to be more aware of the unhealthy junk foods I can easily tend to eat and I'm more able to restrict myself from those temptations now that I know how harmful they can be for my body. I can still work on waking up earlier to cook a hardy breakfast, but I have definitely seen myself being more conscious about my eating decisions and paying more attention to packaging. For the remainder of the semester, I hope to improve my scoring on the exams and have better preparation. As I often miss some of the smaller details in the notes, I plan on creating flashcards for the upcoming unit test and guiding my studying and the information on my cards along with the study guide. I hope that the flashcards will help me understand the terms I am not clear or sure about, resulting in a better performance on exams.   



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Heart Dissection Lab



Lab Questions:
1. The pericardium, a outer fibrous layer and inner double layer of serous membrane, surrounds, protect, and keep the heart in place.

2. We observed that the veins are much thinner than the arteries because they carry blood back to the heart, while arteries carry blood away from the heart and to the rest of the body.

3. The auricles had a rough surface and they are the external part of the atria that increase the blood capacity which results in enabling it to expand and hold a larger amount of blood.

4. The atria have auricles on the top and are smaller than the ventricles, which are covered externally in fat.

5. The coronary sinus takes blood from the coronary veins to the right atrium of the heart. The inferior vena cava is a large vein that collects deoxygenated blood from parts of the body that are inferior to the heart and return it to the right atrium. The right atrioventricular valve, also known as the tricuspid valve, prevents backflow of blood traveling from the the right atrium to the right ventricle.

6.



7. Anchoring the heart valves by the chordae tendinae and the papillary muscles is important to the heart's function because the chordae tendinae attach to the papillary muscles, pulling the chordae tendinae to open and shut the tricuspid valve when the right ventricle contracts, keeping the bood flow back into the right atrium in one direction.

8. The bicuspid valve, similar to the tricuspid valve, located between the left atrium and left ventricle is in charge of preventing backflow of blood.

9. The semi-lunar valves keep blood from going back into the arteries during ventricukar diastole, keeping the blood flowing in one direction.

10.
a)If the valve disease occurs on the right side of the heart, it results in swelling in the feet and ankles because the valves are unable to prevent blood from flowing in it's proper direction, and therefore gravity pulls the blood down and results in backflow.

b)If valve disease occurs on the left side of the body, blood flow to the rest of the body would be inhibited and there would be insufficient flow to the entire body.

11. The coronary arteries are in charge of supplying blood to the heart. The aortic semilunar valves prevent the blood from going back into the ventricles. The chordae tendinae are stringy structures attached to the cusps of valves and the papillary muscles; these muscles allow the chordae tendinae to open and close the valve.

12. In comparison, the right side of the heart is thinner and circulates deoxygenated blood, while the left side is thicker and pumps oxygenated blood to the rest of the body. Deoxygenated blood enters from the superior vena cava and travels through the tricuspid valve and into the right ventricle. It is then carried by the pulmonary veins to the lungs to be oxygenated. Oxygenated blood from the lungs goes into the left atrium through the pulmonary arteries. It then travels through the bicuspid valve and into the left ventricle. From the left ventricle, blood is pumped through the aortic semilunar valve and into the two aortas- the descending aorta carrying oxygenated blood to the lower half of the body and the ascending aorta carrying blood to the upper body. \

13.



Video Tutorial:





Extra Credit Video:



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