Week 5 – Discussion Board 1

[Art Liebl]

In at least 250, words talk about difference in between an artery and veins.  Also, discuss the importance of the four chambers of the heart.  Respond to two fellow students by Monday.

[Isnelda Mancia]

The difference between Arteries and Veins
Arteries and veins, also called blood vessels are tubes of muscle that your blood flows through. Arteries carry blood away from the heart to the rest of the body. Veins push blood back to the heart. We have a complex system of connecting veins and arteries throughout our body.

Arteries carry high oxygen blood away from your heart towards the rest of the body. They branch out into many smaller arteries in other parts of your body. The largest artery is the aorta. This is the first artery your blood travels through after getting new oxygen from your lungs. The aorta starts at your heart and reaches up toward your neck. Smaller arteries branch off of the aorta and go up to your head.

Your blood loses oxygen as it travels through your arteries. Veins carry the blood back to your heart to absorb more oxygen. Your veins usually hold about 75% of all the blood flowing through your body.

The largest veins are the superior and inferior vena cava. The superior vena cava carries blood from your upper body to the heart. The inferior vena cava carries blood from everywhere below your heart.

Unlike arteries, veins generally need to work against gravity to push blood back to your heart.

Importance of the four chambers of the heart
The heart chambers are four hollow spaces within your heart. The upper chambers are called your right atrium and left atrium. The lower chambers are called the right ventricle and left ventricle. The chambers work together to manage your heartbeat, they also send blood into lungs to gain oxygen before recirculating throughout the body.

[Musharraf Bayramova]

Thank you for sharing this. I learned something new, specifically, where the aorta extends and branches out. Also, information about the blood loss of oxygen when it travels from the heart to the rest of the body. Great work!

[Judy Guarin]

Hello Isnelda, Very well explained and broken down. Thank you!

[Leidy Granados]

Nice job explaining the basics in a clear and organized way. I like how you included examples like the aorta and the vena cava to make the information more concrete.

[Musharraf Bayramova]

Arteries, veins, and the four chambers of the heart are part of the circulatory system that is responsible for moving blood, nutrients, hormones, oxygen, and other gases throughout the body’s cells. A disruption in the function of any part can impair the entire circulatory system and as a result pose a threat to the life of the organism.
An artery is a large blood vessel that carries oxygenated blood from the heart to various organs and cell tissues. It has thick walls and a significant mass of muscle tissue that allow it to withstand the high pressure of the blood pumped into it. In contrast, a vein carries deoxygenated blood, enriched with carbon dioxide and other metabolic waste products, back to the heart. Veins have thinner walls and less muscle tissue that allows them to expand and hold blood. They also have valves that open when blood flows toward the heart and close when the flow attempt to move backward. This helps veins overcome gravity and return blood to the heart.
The left and right ventricles, as well as the left and right atria are the four chambers of the heart. The left and right atria are located at the top, and the left and right ventricles are located below them. The chambers are separated by a septum so that the left and tight sides do not communicate, while the upper and lower chambers communicate through openings in the septum. Blood flows through the heart in only one direction. Deoxygenated blood is carried by veins into the right atrium. From there, it flows downward into the right ventricle and is pumped though an artery into the pulmonary circulation. In the lungs, carbon dioxide is removed from the blood and blood becomes oxygenated. After passing through the lungs, the blood returns via the pulmonary vein to the left atrium and sent to the rest of the body.
A disfunction of any part of the circulatory system can lead to impaired blood circulation and increase the risk of serious consequences for the entire body.

[Judy Guarin]

Hello Musharraf, Very well explained! “A disruption in the function of any part can impair the entire circulatory system and as a result pose a threat to the life of the organism”. This is very important information to know, and how scary this can be.

[Judy Guarin]

Arteries and veins are both extremely necessary blood vessels. They both have important differences in structure and function in the circulatory system. Arteries carry blood away from the heart to the rest of the body. This blood is rich in oxygen, because blood in arteries is under high pressure, their walls are thick, muscular, and elastic to handle that pressure. Veins carry blood back to the heart. The blood in veins is low in oxygen. Veins have thinner walls and contain valves that help prevent blood from flowing backward, since the pressure is much lower compared to arteries. The arteries are located deeper within the tissue, as to veins are more superficial which makes them more noticeable over the skin. Veins appear blue/purple due to the oxygen and their thin walls, while the arteries are red.
The four chambers of the heart also play a critical role in maintaining proper circulation. The heart is divided into the right atrium, right ventricle, left atrium, and left ventricle. The right side of the heart is responsible for receiving deoxygenated blood from the body and pumping it to the lungs to receive oxygen. The left side receives oxygenated blood from the lungs and pumps it out to the rest of the body. The left ventricle is especially important because it has the strongest muscle walls, allowing it to pump blood throughout the entire body.
Together, arteries, veins, and the four chambers of the heart make sure oxygen, nutrients, and waste products are efficiently transported. This system is important for maintaining life and keeping all body systems functioning properly.

[Leidy Granados]

Great explanation! You clearly described the structural and functional differences between arteries and veins, and your breakdown of the heart’s four chambers was easy to follow. I especially liked how you highlighted the role of the left ventricle and the importance of valves in veins

[Isnelda Mancia]

Very true, Yudy
Arteries and veins are very different in function and structure, i liked how you explained each one.

[Leidy Granados]

Arteries and veins are essential parts of the circulatory system, working together to transport blood throughout the body. Arteries carry oxygen-rich blood away from the heart to the body’s tissues. Because the blood is pumped directly from the heart, it moves under high pressure. As a result, arterial walls are thick, strong, and muscular to handle this pressure. In contrast, veins carry oxygen-poor blood back to the heart under lower pressure. Their walls are thinner, and they contain valves that help prevent blood from flowing backward, especially when moving against gravity.

The heart also plays a crucial role in circulation and is made up of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. Each chamber has a specific function. The right side of the heart receives oxygen-poor blood from the body and sends it to the lungs to pick up oxygen. The left side receives oxygen-rich blood from the lungs and pumps it out to the rest of the body. The proper function of these four chambers is essential for maintaining blood flow, delivering oxygen, and supporting overall health.

[Isnelda Mancia]

Well said Leidy,regarding the four chambers, as they are essential for supporting overall health.

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