Explain the flow of blood in human through body tissues, lungs and heart.
Answers
Explanation:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.Blood flows through your heart and lungs in four steps: The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve. ... The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve.
Answer:
The heart is an amazing organ. It starts beating about 22 days after conception and continuously pumps oxygenated red blood cells and nutrient-rich blood and other compounds like platelets throughout your body to sustain the life of your organs.
Its pumping power also pushes blood through organs like the lungs to remove waste products like CO2.
This fist-sized powerhouse beats (expands and contracts) about 100,000 times per day, pumping five or six quarts of blood each minute, or about 2,000 gallons per day.
In general, if the heart stops beating, in about 4-6 minutes of no blood flow, brain cells begin to die and after 10 minutes of no blood flow, the brain cells will cease to function and effectively be dead. There are few exceptions to the above.
The heart works by a regulated series of events that cause this muscular organ to contract (squeeze to push blood) and then relax (refill with blood).
The normal heart has 4 chambers that undergo the squeeze and relax cycle at specific time intervals that are regulated by a normal sequence of electrical signals that arise from specialized tissue.
In addition, the normal sequence of electrical signals can be sped up or slowed down depending on the needs of the individual, for example, the heart will automatically speed up electrical signals to respond to a person running and will automatically slow down when a person takes a nap.
This article is designed to help individuals learn the heart anatomy and circulatory system, and provide some insight about heart health. It is not designed to present the many problems that can occur with the heart.
