Showing posts with label Circulatory System. Show all posts
Showing posts with label Circulatory System. Show all posts

Tuesday, March 1, 2016

Heart Wall - Pericardium


We've learned that the heart wall's soft inner most layer is the endocardium, the second layer of muscle is the myocardium and the third protective layer is the epicardium

There is a protective bag outside the heart that is called the pericardium.
The pericardium has liquids in it, and it keeps the heart from getting shaken with every movement the body makes.


(from: wikipedia - pericardium)


Kid Facts - Blast from the past: Brachial Artery

Tuesday, February 23, 2016

Heart Wall - Epicardium


We just learned that the heart wall's soft inner most layer is the endocardium, and the second layer of muscle is the myocardium.

The next layer is called the epicardium.
This layer is a barrier to protect the heart.


(from: wikipedia - pericardium)


Kid Facts - Blast from the past: Axillary Artery

Tuesday, February 16, 2016

Heart Wall - Myocardium


We just learned about the first inside part of the heart wall called the endocardium.

The next part of heart wall is the Myocardium.

This part of the heart wall has the muscles in it that squeeze together to make the heart pump the blood through the body.


(from: wikipedia - cardiac muscle)


Kid Facts - Blast from the past: Dorsal Scapular Artery

Tuesday, February 9, 2016

Heart Wall - Endocardium


We just learned about the pulmonary valve in the heart that opens for blood to go to the lungs for oxygen.

The walls of the heart are made up of different types of layers.

The inside wall of the heart is called the endocardium.
This is a thin layer that keeps the inside of the heart soft, smooth and wet, and also helps the heart send it's electrical signals all over that are part of what keeps it beating at the right time.


(from: wikipedia - endocardium)


Kid Facts - Blast from the past: Internal Thoracic Artery

Tuesday, February 2, 2016

Pulmonary Valve


We've now learned about three of the four heart valves:
The tricuspid valve between the right atrium and ventricle,
the mitral valve between the left atrium and ventricle,
and the Aortic Valve between the left ventricle and aorta.

The fourth valve is the pulmonary valve, between the right ventricle and pulmonary artery.
When the right ventricle pushes the pulmonary valve open, the blood goes from the heart to the lungs for oxygen.


(from: wikipedia - pulmonary valve)

Kid Facts - Blast from the past: Vertebral Artery

Tuesday, January 26, 2016

Aortic Valve


We've learned about the tricuspid valve between the right atrium and ventricle, and the mitral valve between the left atrium and ventricle.

Another valve is called the aortic valve which is between the left ventricle and the aorta.

This valve opens for the heart to pump blood out to all the parts of the body, and then closes so the blood doesn't leak back into the heart.



(from: wikipedia - aortic valve)


Kid Facts - Blast from the past: Subclavian Artery

Tuesday, January 19, 2016

Mitral Valve


We just learned about the tricuspid valve between the right atrium and ventricle.

Another valve is called the mitral valve and it is between the left atrium and left ventricle.

It opens to let blood flow from the left atrium into the left ventricle, and then closes so the blood doesn't flow back into the left atrium.


(from: wikipedia - mitral valve)


Kid Facts - Blast from the past: External Carotid Artery

Tuesday, January 12, 2016

Tricuspid Valve


We just learned that there are heart valves that control the flow of blood in the chambers of the heart.

One of the valves is called the tricuspid valve, which is between the right atrium and right ventricle.

When blood comes in and fills up the right atrium, the tricuspid valve opens, letting all the blood flow into the right ventricle.
Then it closes to keep the blood from flowing back into the right atrium.


(from: wikipedia - tricuspid valve)


Kid Facts - Blast from the past: Internal Carotid Artery

Tuesday, January 5, 2016

Heart - Valves


We just learned about how the blood flows through the ventricles, atriums, veins and arteries.

In between each of these areas is something called a valve which opens and closes to let the blood out or keep it in.


(from: wikipedia - heart valve)


Kid Facts - Blast from the past: Common Carotid Artery

Tuesday, December 29, 2015

Heart - Blood Flow


We've now learned about all of the arteries and veins that pump blood all over the body.

The part of the body that does the pumping is the heart, which has 4 chambers that we've already learned about.

Deoxygenated blood comes into the Right Atrium and then goes to Right Ventricle.
The Right Ventricle pushes the blood to the lungs to get oxygen, then the oxygenated blood comes into the Left Atrium.
The blood then goes into the Left Ventricle which sends the blood to all parts of the body, and it comes back to the Right Atrium where we started.

So it goes Right Atrium, Right Ventricle, Lungs, Left Atrium, Left Ventricle, Body, Right Atrium.

(from: wikipedia - heart)


Kid Facts - Blast from the past: Aortic Arch

Tuesday, December 22, 2015

Pulmonary Artery


We just learned about the right ventricle pumps deoxygenated blood out of the heart to get filled up with oxygen at the lungs.

The deoxygenated blood leaves the heart through the pulmonary artery and goes to the lungs in capillaries.

It might seem strange that even though it is carrying deoxygenated blood it is called an artery instead of a vein.

The reason it is called an artery is because it is bringing blood away from the heart, and veins all pump toward the heart. So after the blood gets filled with oxygen, it brings oxygenated blood back to the heart in the pulmonary vein



(from: wikipedia - pulmonary artery)


Kid Facts - Blast from the past: Ascending Aorta

Tuesday, December 15, 2015

Right Ventricle


We just learned that the right atrium fills up with deoxygenated blood from the body.

After that the blood goes into the right ventricle which pumps the blood out of the heart and over to the lungs to get filled up with oxygen.


(from: wikipedia - ventricle (heart))


Kid Facts - Blast from the past: Aorta

Tuesday, December 8, 2015

Right Atrium


We just learned about the jugular vein that brings deoxygenated blood from the head and neck down toward the heart.

All of the arteries in the push blood away from the heart, and all of the veins bring blood back toward the heart.

We learned about the superior and inferior vena cava that brings blood back into the heart.
That goes right into the right atrium a chamber in the heart that fills up with deoxygenated blood.


(from: wikipedia - atrium (heart))


Kid Facts - Blast from the past: Left Ventricle

Tuesday, December 1, 2015

Jugular Vein


We just learned about the Digital Veins that bring deoxygenated blood back from the fingers toward the heart.
So we've now learned about all the veins of the legs and the arms.

There is a big vein in the neck called the jugular vein, that brings deoxygenated blood back from the head toward the heart.

There are two jugular veins, the external and internal. The internal one is more inside the middle of the neck, and the external one is more toward the outside of the neck.

You can feel your pulse in the jugular vein in your neck.

After the jugular there are about 50 other small veins that connect to the brain, eyes, ears, mouth and every part of your body.


(from: wikipedia - external jugular vein)


Kid Facts - Blast from the past: Left Atrium

Tuesday, November 24, 2015

Digital Veins


We just learned about the Superficial Palmar Venous Arch.

The veins in the fingers are called the digital veins.

(from: wikipedia - palmar digital veins)

Kid Facts - Blast from the past: Pulmonary Vein

Tuesday, November 17, 2015

Superficial Palmar Venous Arch


We just learned about the Dorsal Venous Network of the Hand

The veins on the bottom or palm side of your hand are called the Superficial Palmar Venous Arch.

These veins are much smaller and can't really be seen from the skin, but they are right up along the arteries in the palm.

(from: wikipedia - superficial palmar venous arch)


Kid Facts - Blast from the past: Capillaries

Tuesday, November 10, 2015

Dorsal Venous Network of the Hand


We just learned about the Radial and Ulnar Veins in the forearm and wrist that bring deoxygenated blood back toward the heart.

There are veins on the top or back of your hand, called the dorsal side, that stick out a lot, and are sometimes used by doctors when they need to put a needle into your veins.

These large veins are called the dorsal venous network of the hand.

The word dorsal means top, like the dorsal fin on top of a dolphin's back, so the dorsal veins are on the top or back of your hand.
The palmar veins are by the palm of your hand.


(from: wikipedia - dorsal venous network of hand)


Kid Facts - Blast from the past: Circulatory System

Tuesday, November 3, 2015

Radial and Ulnar veins


We just learned about the median cubital vein in your elbow.

The veins below that are the radial and ulnar veins that bring deoxygenated blood from your wrist and forearm, back toward your heart.

The radial vein is the vein in your wrist by your thumb where doctors will sometimes feel your pulse.


(from: wikipedia - ulnar veins)


Kid Facts - Blast from the past: Large Intestine

Tuesday, October 27, 2015

Median Cubital Vein


We just learned about the Axillary, Cephalic and Brachial veins in the upper arm.

There is a very important vein in the elbow area called the median cubital vein.

This vein brings blood through the elbow area and back up the arm toward the heart.

When doctors have to put medicine into your blood, or if they have to take a sample of your blood to test for something, they usually poke a needle into your median cubital vein.

This is because it is a very large vein, and very close to the top of your skin so it is easy to see and find.

(from: wikipedia - median cubital vein)


Kid Facts - Blast from the past: Rectum

Tuesday, October 20, 2015

Axillary, Cephalic, Brachial veins


We just learned about how the subclavian veins bring deoxygenated blood back toward the heart.

Those veins are connected to three smaller veins from the upper arm and shoulder area.
The axillary vein, cephalic vein, and brachial veins.

The cephalic vein goes up over the top of your deltoid shoulder muscle.
The axillary vein goes under your arm in your armpit.
The brachial veins are smaller veins connected to the axillary vein, that go off toward your bicep muscle.

(from: wikipedia - axillary vein)


Kid Facts - Blast from the past: Appendix