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circulatory system

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Ansh Singh

on 30 April 2015

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Transcript of circulatory system

Circulatory System
Defined: a summary or abstract of a text or speech ORIGIN: mid 18th cent.: from French précis, literally ‘precise’
The heart of the matter
After the arteries branch off from the heart, they divide into smaller arteries that in turn divide into even smaller vessels called arterioles.
Blood surges through the arteries in pulses that correspond with the rhythm of the heartbeat.
Your Blood Vessels: Pathways of Circulation
Type O blood does not contain any antigens, therefore it does not spark an immune response from the body of a person receiving the blood.
Section 2 Check
Blood pressure then drops dramatically as the ventricles relax.
The high pressure is called systolic pressure.
Blood pressure
The impulse also triggers a second set of cells at the base of the right atrium to send the same electrical impulse over the ventricles, causing them to contract.
The impulse signals the two atria to contract at almost the same time.
Heartbeat regulation
The left ventricle pumps blood to the entire body, so its muscles are thicker than those of the right ventricle, which pumps blood to the lungs.
The ventricles perform more work than the atria, a factor that helps explain the thickness of their muscles.
Each atrium pumps blood into the corresponding ventricle.
Your Heart: The Vital Pump
The main function of the heart is to keep blood moving constantly throughout the body.
Your Heart: The Vital Pump
Blood in veins is not under pressure as great as that in the arteries.
In some veins, especially those in your arms and legs, blood travels uphill against gravity.
Your Blood Vessels: Pathways of Circulation
As blood leaves the tissues, the capillaries join to form slightly larger vessels called venules.
Thin capillary walls enable nutrients and gases to diffuse easily between blood cells and surrounding tissue cells.
Your Blood Vessels: Pathways of Circulation
Blood pressure rises sharply when the ventricles contract, pushing blood through the arteries.
Blood pressure rises and falls as the heart contracts and then relaxes.
Blood pressure is the force that the blood exerts on the blood vessels.
Blood pressure
When the right ventricle contracts, it pushes the oxygen-poor blood from the right ventricle out of the heart and toward the lungs through the pulmonary arteries.
After the ventricles have filled with blood, they contract simultaneously.
After they have filled with blood, the two atria then contract, pushing the blood down into the two ventricles.
Blood’s path through the heart
Capillaries form a dense network that reaches virtually every cell in the body.
Capillaries (KA puh ler eez) are microscopic blood vessels with walls that are only one cell thick.
Your Blood Vessels: Pathways of Circulation
A. red blood cells
B. white blood cells
C. plasma
D. platelets
Question 1
What component of blood is responsible for helping your blood clot?
The right atrium receives oxygen-poor blood from the head and body through two large veins called the vena cava
Blood enters the heart through the atria and leaves it through the ventricles.
Both atria fill up with blood at the same time.
Blood’s path through the heart
The venules merge to form veins, the large blood vessels that carry blood from the tissues back toward the heart.
Your Blood Vessels: Pathways of Circulation
As the heart contracts, it pushes blood through the arteries.
The blood that they carry is under great pressure.
Arteries are large, thick-walled, muscular, elastic blood vessels that carry blood away from the heart.
Your Blood Vessels: Pathways of Circulation
Heartbeat regulation
The walls of each atrium are thinner and less muscular than those of each ventricle.
The two lower chambers are the ventricles.
All mammalian hearts, including yours, have four chambers.
The two upper chambers of the heart are the atria.
Your Heart: The Vital Pump
Your Blood Vessels: Pathways of Circulation
These veins are equipped with valves that prevent blood from flowing backward.
The passage of blood
The left atrium receives oxygen-rich blood from the lungs through four pulmonary veins.
Blood’s path through the heart
At the same time, the left ventricle forcefully pushes oxygen-rich blood from the left ventricle out of the heart through the aorta to the arteries of the body. The aorta is the largest blood vessel in the body.
Blood’s path through the heart
Your Blood Vessels: Pathways of Circulation
CA: Biology/Life Sciences 9a
Arch of aorta
Pulmonary trunk
Left atrium
Left ventricle
Rib (cut)
Left lung
Left coronary artery
Cut edge of pericardium
Right coronary artery
Right ventricle
Right atrium
Right lung
Superior vena cava
Section 2 Check
The lowest pressure occurs just before the ventricles contract again and is called diastolic pressure.
Blood pressure
The three main types of blood vessels are arteries, capillaries, and veins.
Ventricles: two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries.
From what ventricle does the blood flow to the aorta?
Arteries- from the heart
Veins- to the heart
Atria: two upper chambers on each side of the heart that receive blood from the veins and in turn force it into the ventricles.
Pericardium is a tough double layered membrane which covers the heart. The space between the two layers of it is filled with a pericardium fluid which protects the heart from any kind of external jerk or shock.
This pacemaker generates an electrical impulse that spreads over both atria.
The heart rate is set by the pacemaker, a bundle of nerve cells located at the top of the right atrium.
Left side receives oxygenated blood from lungs and sends it to the body.
Right side receives deoxygenated blood from the body and pumps blood to the lungs
Pericardium- double layered lining around the heart.
Sinoatrial Node (SA)
Atrioventricular Node (AV)
Sinoatrial Node (SA)
Atrioventricular Node (AV)
What is #1?
Put your finger to your neck and feel for your pulse. What is that you are feeling?
The Circulatory System is responsible for transporting materials throughout the whole body. It transports nutrients, water, and oxygen to all the cells and organs in your body and also takes away wastes products such as carbon dioxide that cells produce.
What is the Circulatory System Responsible For?
How Does Daily Physical Activity Affect the Circulatory System?
Daily physical activity affects the circulatory system by making the lungs give oxygenated blood to the heart so that the arteries can take the oxygenated blood through the entire body
How the Blood Moves Through Each Chamber
Parts of the Circulatory System
Right atrium
Left atrium
Right ventricle
Left ventricle
Tricuspid valve
Bicuspid valve
Pulmonary artery
Pulmonary vein
Seperior vena cava
Inferior vena cava
It is one of the four chambers of the heart. The deoxygenated blood first enters the right atrium
What Is the Right Atrium
Right atrium
The left atrium is a chamber of the heart. It is the first chamber that receives oxygeneted blood from the pulmonary vein.
What Is The Left Atrium
Left Atrium
It is also one of the four chambers of the heart. It is responsible for pumping blood to the lungs.
What Is Right Ventricle
Right ventricle
The left ventricle is the thickest of all the chambers. The left ventricle pumps oxygenated blood to all the cells and organs.
What is the Left Ventricle
left ventricle
The Tricuspid valve is on the right side of the heart, between the right atrium and the right ventricle. It is made up of three cusps called the Anterior, Posterior, Septal.
What is the Tricuspid Valve
The Bicispid valve is in between the left atrium and left ventricle. It has two flaps that are made of tissue
What is the Bicispid valve
The Septum is a divider. It divides the left and the right side of your heart.
What is the Septum
The Pulmonary artery is the only artery that can take deoxygenated blood from the heart to the lungs.
What is the Pulmonary Artery
The Pulmonary vein is responsible for bringing the oxygenated blood to the left atrium
What is the Pulmonary vein
What is the Seperior Vena Cave and
the Inferior Vena Cava?
The Vena Cava is the largest vein that carries deoxygenated blood into the right atrium.There are only two in the human body.
1. The inferior Vena Cava, carries blood from the lower body
2.The superior Vena Cava, carries blood from the head, arms and upper body
Inferior vena cava
What is the Aorta?
The Aorta is the main and the largest artery of the human body. It takes blood from the left ventricle then divides into smaller arteries. It passes over the heart from the left ventricle and runs down in front of the back bone.
What are capillaries
Capillaries are the smallest blood vessels in the human body.Their job is to distribute oxygenated blood from the arteries to the tissues of the body and take the deoxygenaed blood from the tissue and give it to the veins
What is Coronary Artery Disease?
Coronary artery disease occurs when the artery that supplies blood to the heart muscle becomes harden and narrowed. This is due to build up of cholesterol.
Prevention for Coronary Artery Disease
Fiber-rich diet
not only helps you to keep your cholesterol level low but also gives nutrients that may help protect against coronary artery disease. A
low salt and sugar diet
is recommended . A low-salt diet can help you manage your blood pressure.While a low-sugar diet can help you prevent weight gain and control diabetes and
Regular exercise.
Symptoms for Coronary Artery Disease
Some symptoms for coronary artery disease may include:
Chest pain
Heart attack
Rapid heartbeat
Treatment for coronary artery disease
Treatment for Coronary Artery Disease
Treatment for coronary artery disease usually involves lifestyle changes and certain drugs and medical procedures.
Lifestyle changes
Making a commitment to the following healthy lifestyle changes can go a long way towards promoting healthier arteries
Quit smoking
eat healthy foods
exercise regularly
lose excess weight
reduce stress
Any Questions?
Superior vena cava
I am concluding my seminar saying
Health Heart For Healthy Life
Thank You
What are arteries?
Arteries take oxygenated blood from the heart and give it all the cells and organs in your body
What are veins
Veins takes deoxygenated blood from all the cells and organs in your body and gives it to the right atrium
Full transcript