Left Atrium

We've learned that our blood gets filled up with good oxygen in the capillaries by the lungs, and then goes through tubes called the pulmonary veins toward the heart.

The oxygen filled blood, sometimes called oxygenated blood, enters the heart at a place called the left atrium.

The heart is divided up into four parts, called chambers, and the atrium is one of those chambers.

(from: wikipedia - left atrium)


Kid Facts - Blast from the past: Tongue

Pulmonary Vein

We've learned that our blood gets filled up with good oxygen in the capillaries down by the lungs.

After the tiny capillaries are filled up with good oxygen, they connect to larger tubes called veins, and the blood flows toward the heart.

The veins that connect the capillaries to the heart are called the pulmonary veins.


(from: wikipedia - pulmonary vein)

Kid Facts - Blast from the past: Plantar Foot Muscles

Capillaries

Let's keep learning about the Circulatory System.

We've learned before about how air comes in to the lungs and all the way down to the blood-air barrier where the oxygen goes into the blood.

On one side of the barrier are the alveoli holding the oxygen, and the other side has the capillaries which hold the blood that is ready to take in oxygen.

Capillaries are very tiny small tubes. They bring the blood right to the blood air barrier and then carry it off to the heart.

(from: wikipedia - capillary)


Kid Facts - Blast from the past: Dorsal Foot Muscles

Circulatory System

We just learned about the Large Intestine that helps digest food.

We've learned a lot about the human body already!

We've learned about all of the bones called the skeletal system, all of the muscles called the muscular system, the way we breathe air, called the respiratory system, and the way our bodies use up our food, called the digestive system.

Another system in our body is the one that pumps all the blood through our bodies.
That is called the circulatory system or cardiovascular system.

The word circulate means to move things around, like the blood going to all the places in your body.
The word cardio means the heart, and the word vascular means the veins and arteries that pump the blood.

Next time we'll start learning about the heart, the veins and how all the parts of the cardiovascular system work.

(from: wikipedia - circulatory system)


Kid Facts - Blast from the past: Palmar Interossei Hand Muscles