By Derek.Herridge By Derek.Herridge Block D. Mr.T Block D. Mr.T A journey into the body’s A journey into the body’s most important function. most important function.
By Derek.Herridge Block D. Mr.T A journey into the bodys most important function.
Mar 26, 2015
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
By Derek.HerridgeBy Derek.HerridgeBlock D. Mr.TBlock D. Mr.T
A journey into the body’s most A journey into the body’s most important function.important function.
Structure of The Heart Structure of The Heart
The heart is a very The heart is a very complicated organ. complicated organ. In order to In order to understand it understand it more, people draw more, people draw diagrams that diagrams that show it’s stucture.show it’s stucture.
Location Location
In the human body, the In the human body, the heart is normally heart is normally situated in the left of situated in the left of the middle of the the middle of the thorax, underneath the thorax, underneath the breastbone. The heart breastbone. The heart is usually felt on the left is usually felt on the left side because the left side because the left ventricle is stronger. ventricle is stronger. The left lung is also The left lung is also smaller than the right smaller than the right lung because the heart lung because the heart occupies most of the occupies most of the left hermithorax. left hermithorax.
HeartbeatHeartbeat The heart works as a The heart works as a
pump to send oxygen pump to send oxygen rich blood throughout rich blood throughout the body. A human the body. A human heart beats on average heart beats on average of 100000 times per of 100000 times per day. In that time, it day. In that time, it pumps more than 4300 pumps more than 4300 gallons of blood gallons of blood throughout the entire throughout the entire body. The human body body. The human body has about 5.6 liters of has about 5.6 liters of blood, all of which blood, all of which circulates through the circulates through the body three times every body three times every minute. minute.
Cycle of the BloodCycle of the Blood The hearts cycle starts The hearts cycle starts
when oxygen poor blood when oxygen poor blood from the body flows into from the body flows into the right atrium. Next, the right atrium. Next, blood flows through the blood flows through the right atrium to the right right atrium to the right ventricle, which serves as a ventricle, which serves as a pump that sends blood to pump that sends blood to the lungs. Within the lungs, the lungs. Within the lungs, the blood releases waste the blood releases waste gasses and picks up gasses and picks up oxygen. This newly oxygen oxygen. This newly oxygen enriched blood returns from enriched blood returns from the lungs to the left atrium. the lungs to the left atrium. Then blood flows from the Then blood flows from the left atrium to the left left atrium to the left ventricle. Finally, the left ventricle. Finally, the left ventricle pumps blood all ventricle pumps blood all throughout the body.throughout the body.
Structures of the Heart Part Structures of the Heart Part 11
Superior vena cava: One of the two main Superior vena cava: One of the two main veins bringing deoxygenated blood veins bringing deoxygenated blood from the body to the heart. Brings from the body to the heart. Brings blood from upper body.blood from upper body.
Inferior vena cava : One of the two main Inferior vena cava : One of the two main veins bringing deoxygenated blood veins bringing deoxygenated blood from the body to the heart. Brings from the body to the heart. Brings blood from lower body.blood from lower body.
Right Atrium: The upper right chamber of Right Atrium: The upper right chamber of the heart. Receives deoxygenated the heart. Receives deoxygenated blood from the superior vena cava and blood from the superior vena cava and the inferior vena cava. Blood here the inferior vena cava. Blood here flows to the right ventricle through the flows to the right ventricle through the open tricuspid valve. open tricuspid valve.
Right Ventricle: The lower right chamber Right Ventricle: The lower right chamber of the heart. Receives blood from the of the heart. Receives blood from the right atrium as it contracts. Then right atrium as it contracts. Then sends blood to the lungs to be sends blood to the lungs to be reoxygenized. The right and left reoxygenized. The right and left ventricles contract simultaneously, but ventricles contract simultaneously, but because the right ventricle is thinner because the right ventricle is thinner than the left, it produces a lower than the left, it produces a lower pressure than the left when pressure than the left when contracting. contracting.
Structures of the Heart Part Structures of the Heart Part 22
Aorta: The central conduit from the heart to the body, the Aorta: The central conduit from the heart to the body, the aorta carries oxygenated blood from the left ventricle to aorta carries oxygenated blood from the left ventricle to various parts of the body as the left ventricle contracts. various parts of the body as the left ventricle contracts.
Left Atrium: The upper left chamber of the heart. The left Left Atrium: The upper left chamber of the heart. The left atrium receives oxygenated blood from the lungs through atrium receives oxygenated blood from the lungs through the pulmonary veins. Then sends blood to left ventricle.the pulmonary veins. Then sends blood to left ventricle.
Left Ventricle: The lower left chamber of the heart, receives Left Ventricle: The lower left chamber of the heart, receives oxygenated blood from the left atrium. The left and right oxygenated blood from the left atrium. The left and right ventricles contract simultaneously, however, because the ventricles contract simultaneously, however, because the left ventricle is thicker than the right, it produces a higher left ventricle is thicker than the right, it produces a higher pressure than the right when contracting. The higher pressure than the right when contracting. The higher pressure is necessary to pump blood through the body. pressure is necessary to pump blood through the body.
Tricuspid Valve: One of the four one way valves that keeps Tricuspid Valve: One of the four one way valves that keeps blood flowing properly through the various chambers of the blood flowing properly through the various chambers of the heart. Standing between the right atrium and the left heart. Standing between the right atrium and the left ventricle, the tricuspid valve is the first valve that blood ventricle, the tricuspid valve is the first valve that blood encounters as it enters the heart.encounters as it enters the heart.
Structures of Heart part 3Structures of Heart part 3
Aortic Valve: One of the four one way valves that Aortic Valve: One of the four one way valves that keeps blood flowing properly through the various keeps blood flowing properly through the various chambers of the heart. The aortic valve separates chambers of the heart. The aortic valve separates the left ventricle from the aorta. the left ventricle from the aorta.
Mitral Valve: One of the four one way valves that Mitral Valve: One of the four one way valves that keeps blood flowing through the various keeps blood flowing through the various chambers of the heart. The mitral valve separates chambers of the heart. The mitral valve separates the left atrium from the left ventricle.the left atrium from the left ventricle.
Septum: The wall between the two upper chambers Septum: The wall between the two upper chambers of the heart( the left and right atrium.)of the heart( the left and right atrium.)
Pulmonary Artery: The pulmonary arteries carry Pulmonary Artery: The pulmonary arteries carry blood from the heart to the lungs and vise versa. blood from the heart to the lungs and vise versa.
The Heart MuscleThe Heart MuscleA powerful muscle slightly larger than a clenched fist. It is composed of four chambers and sends oxygen rich blood throughout the body.
Heart disease and problems Heart disease and problems
There are a number of different heart diseases that one could obtain from various effects such as smoking. Smoking is very dangerous for the body’s heart and lungs because it is filled with deadly poisons.
M.U.G.A scans of heartM.U.G.A scans of heart
MUGA scans allow doctors to see if everything is functioning properly in a persons heart. Its done by injecting a substance in the blood stream that is sensitive to radioactive waves, then once the waves enter and leave the heart, doctors can see if a persons heart is functioning normally.
Ultrasound Scans of heartUltrasound Scans of heart
Ultrasound is another way to check the heart functioning. Basically, a machine emits sound than has enough depth to penetrate some organs, and not others
M.R.I ScanM.R.I Scan
M.R.I stands for M.R.I stands for magnetic resonance magnetic resonance imaging. It is a fairy imaging. It is a fairy new technique that new technique that has been used since has been used since the 1980’s. The M.R.I the 1980’s. The M.R.I uses magnetic radio uses magnetic radio waves, meaning there waves, meaning there is no exposure to X-is no exposure to X-rays, or another form rays, or another form of dangerous of dangerous radiation. radiation.
Related Documents
