1. Compare the structure of the atria and ventricles - how are they different? Why is that?
The left ventricle is larger than the right ventricle because the left ventricle must pump blood to the whole body, while the right ventricle needs only to pump blood to the lungs.
The atriums are smaller than the ventricles because the atrias only need to pump blood to the ventricles, and the ventricles must pump blood to the lungs and the entire body.
2. Did you notice a difference between the veins and arteries entering and leaving the heart? How is their structure different?
3. Describe the valves that you found in the heart - what are their functions?
Tricuspid Atrioventricular (AV) Valves: valves between right atrium and right ventricle.
Mitral/Bicuspid Atrioventricular (AV) Valves: valves between left atrium and left ventricle.
Both AV Valves control the flow of blood between the chambers and keep blood from flowing backwards.
Both also have strong and fibrous strings called chordae tendineae that support the valves and keep them from inverting.
Pulmonary Semilunar Valve: valves between the pulmonary trunk/artery and right ventricle.
Aortic Semilunar Valve: vales between the left ventricle and aorta.
Both semilunar valves are crescent moon-shaped and also prevent back flow of blood into the ventricles.
4. What surprised you about dissecting the heart? Why?
I was surprised that there was so much chordae tendineae and valves to look at and see because I believed they would be slightly larger and have a much less quantity. I was also surprised at how strong the valves were. They looked really thin, but when felt they were very stretchy and tight.
I was surprised that the arteries and veins were so difficult to spot and see which was which. I expected them to be easy to point out because its obviously much easier on paper, but on the real thing it was really hard.
Friday, April 26, 2013
Hearty heart heart
HEART DISSECTION DONE BY ANNA, VICKI, AND AMBER.
Yummeh
Buh-luuhd-eh
Nasteh
Squish-eh
Stank-eh
Love-leh piggi harts
Be appetized.
Yummeh
Buh-luuhd-eh
Nasteh
Squish-eh
Stank-eh
Love-leh piggi harts
Be appetized.
Tuesday, April 23, 2013
This is a silent video
Ella this is Anna and I's video about blood flow in the heart... it is silent because there is no sound and it is a little asks.
We are kind of missing the semilunar valves but they are the crescent moon shaped flaps (one at the opening of the pulmonary artery and one at the ending of the aorta) that prevent back flow of blood.
Oxygenated blood moves in through the pulmonary vein, through the left ventricle and atrium, and out through the aorta.
Deoxygenated blood moves in through the inferior and superior vena cavas, through the right ventricle and atrium, and exits out the pulmonary artery.
Arteries take blood away from the heart, while veins return the blood to the heart.
We are kind of missing the semilunar valves but they are the crescent moon shaped flaps (one at the opening of the pulmonary artery and one at the ending of the aorta) that prevent back flow of blood.
Oxygenated blood moves in through the pulmonary vein, through the left ventricle and atrium, and out through the aorta.
Deoxygenated blood moves in through the inferior and superior vena cavas, through the right ventricle and atrium, and exits out the pulmonary artery.
Arteries take blood away from the heart, while veins return the blood to the heart.
Nasti hart thigs
WHAT HAPPENS TO YOUR HEART WHEN YOU SMOKE?
When you smoke, the chemicals that you breathe in affect all parts of your body, including the heart. Smoking damages your blood cells and blood vessels, and smoking chemicals can lead to a build-up of plaque in your arteries and veins, causing clogging. This is called atherosclerosis. If your arteries become clogged, oxygen-rich blood cannot travel efficiently through your body and to your heart. You can suffer chest pain, heart attack, heart failure, or even death.
http://www.nhlbi.nih.gov/health/health-topics/topics/smo/
SUPER GROSS VIDEO ABOUT STUFF IN ARTERIES WHEN YOU SMOKE.
When you smoke, the chemicals that you breathe in affect all parts of your body, including the heart. Smoking damages your blood cells and blood vessels, and smoking chemicals can lead to a build-up of plaque in your arteries and veins, causing clogging. This is called atherosclerosis. If your arteries become clogged, oxygen-rich blood cannot travel efficiently through your body and to your heart. You can suffer chest pain, heart attack, heart failure, or even death.
http://www.nhlbi.nih.gov/health/health-topics/topics/smo/
SUPER GROSS VIDEO ABOUT STUFF IN ARTERIES WHEN YOU SMOKE.
Friday, April 5, 2013
I HOPE YOU BREATHE IN MY DEAD BODY PARTS.
HOW MUCH DUST DO YOU SUCK IN?
The average person inhales bout 44 pounds of dust in a lifetime.
Dust that is small enough to pass the cilia in the nasal cavity, trachea, and bronchi reach the sacs and the lower part of the airways where there is no cilia to trap the dust. They are then attacked by macrophages to be eliminated. This is very important as they defend the lungs and keep them clean. Another way for dust to be removed from the lungs is by germ-bearing particles which are produced by proteins.
Dust can come from grinding metals and minerals, like rock and soil. (Silica, asbestos, coal)
Dust can also come from plants and animals. They can be fungi, microbes, or toxic substances. Also dyes and pesticides.
The majority of dust consists of dead skin cells. YA NASTEH.
When dust builds up, it can inflame the trachea and the bronchi, causing tracheitis and bronchitis.
Diseases caused by too much inhalation of dust is called "Dusty Lung" disease or pneumoconiosis.
To protect the lungs from being susceptible to dust:
- use vacuums instead of brooms
- clean your area frequently, be a good housekeeper
- dispose dangerous waste in a controlled manner
- wear a face mask when working in high-dust areas
- clean your area before working in it for long periods
http://www.ccohs.ca/oshanswers/chemicals/lungs_dust.html#_1_2
The average person inhales bout 44 pounds of dust in a lifetime.
Dust that is small enough to pass the cilia in the nasal cavity, trachea, and bronchi reach the sacs and the lower part of the airways where there is no cilia to trap the dust. They are then attacked by macrophages to be eliminated. This is very important as they defend the lungs and keep them clean. Another way for dust to be removed from the lungs is by germ-bearing particles which are produced by proteins.
Dust can come from grinding metals and minerals, like rock and soil. (Silica, asbestos, coal)
Dust can also come from plants and animals. They can be fungi, microbes, or toxic substances. Also dyes and pesticides.
The majority of dust consists of dead skin cells. YA NASTEH.
When dust builds up, it can inflame the trachea and the bronchi, causing tracheitis and bronchitis.
Diseases caused by too much inhalation of dust is called "Dusty Lung" disease or pneumoconiosis.
To protect the lungs from being susceptible to dust:
- use vacuums instead of brooms
- clean your area frequently, be a good housekeeper
- dispose dangerous waste in a controlled manner
- wear a face mask when working in high-dust areas
- clean your area before working in it for long periods
http://www.ccohs.ca/oshanswers/chemicals/lungs_dust.html#_1_2
By: Vicki and Amber
Wednesday, April 3, 2013
DID I SAY U COULD BREATH
1. How does your vital capacity compare to others in the class? Describe some reasons why you think your vital capacity is what it is. Why are the highest and lowest vital capacities the way they are?
My vital capacity is 3.2 litres. It is above average, but most other girls in the class got around the same.
I believe my vital capacity is the way that it is because i have a larger frame than other girls, and so I am able to breathe out more air. I have also been exercising more! YAAAAAY.
The highest vital capacity was 5 litres. The lowest was 1.6 litres. The highest vital capacity was high because the person was male. The lowest was female. I believe males are able to breathe out more air because they are bigger than females, and have stronger muscles.
2. How much air is in a usual breath? Why are our breaths the volume that they are?
In a usual breath, there is approximately 2 litres of air for girls, and 4 litres of air for boys.
I believe that girls generally have a smaller build and frame than boys, therefore most girls cannot intake as much air as boys. - idea credit: Tasha LOLOLOLOLS.
Our breaths are the volume that they are because idk cause our lung capacity and thoracic cavity can only intake so much. Also our diaphragm and intercostal muscles are not as strong as males to contract and inhale/exhale the air.
3. How is the mechanism of exhaling forcefully different than a usual exhalation? Why would you practice at this via exercise/instrument playing/singing make you better at it?
The mechanism of inhaling forcefully is different than a usual exhalation because when we naturally exhale, we do not think about it. When forcefully exhaling, we voluntarily make our muscles expand to release the air.
To become better at forceful exhalation, exercising, instrument playing, and singing could help because you need to take large breaths and release large breaths while doing these actions. While exercising, playing an instrument, and singing, we need to be able to breathe efficiently, and this helps in singing and holding/playing a note longer.
My vital capacity is 3.2 litres. It is above average, but most other girls in the class got around the same.
I believe my vital capacity is the way that it is because i have a larger frame than other girls, and so I am able to breathe out more air. I have also been exercising more! YAAAAAY.
The highest vital capacity was 5 litres. The lowest was 1.6 litres. The highest vital capacity was high because the person was male. The lowest was female. I believe males are able to breathe out more air because they are bigger than females, and have stronger muscles.
2. How much air is in a usual breath? Why are our breaths the volume that they are?
In a usual breath, there is approximately 2 litres of air for girls, and 4 litres of air for boys.
I believe that girls generally have a smaller build and frame than boys, therefore most girls cannot intake as much air as boys. - idea credit: Tasha LOLOLOLOLS.
Our breaths are the volume that they are because idk cause our lung capacity and thoracic cavity can only intake so much. Also our diaphragm and intercostal muscles are not as strong as males to contract and inhale/exhale the air.
3. How is the mechanism of exhaling forcefully different than a usual exhalation? Why would you practice at this via exercise/instrument playing/singing make you better at it?
The mechanism of inhaling forcefully is different than a usual exhalation because when we naturally exhale, we do not think about it. When forcefully exhaling, we voluntarily make our muscles expand to release the air.
To become better at forceful exhalation, exercising, instrument playing, and singing could help because you need to take large breaths and release large breaths while doing these actions. While exercising, playing an instrument, and singing, we need to be able to breathe efficiently, and this helps in singing and holding/playing a note longer.
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