Scientists have been trying to pull blood out of the body and put it back in again since the early 1800s, but bypass machines haven't been easy to get right.

Scientists have been trying to pull blood out of the body and put it back in again since the early 1800s, but bypass machines haven't been easy to get right.

What color is your blood. Red, right? Well, actually, yes. So why does it look blue when you see it through your skin? And is everyone's blood always the same color red (spoiler: no)? Do all animals have red blood ('nother spoiler: no!)?...

Join the Amoeba Sisters in their introduction to the circulatory system and follow the pathway of blood as it travels through the heart! This video explains the importance of blood, arteries, and veins, and it also introduces basic heart...

Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function.

It's an increasingly common sight in hospitals around the world: a nurse measures our height, weight, blood pressure, and attaches a glowing plastic clip to our finger. Suddenly, a digital screen reads out the oxygen level in our...

The circulatory system is a vast, complex network of blood vessels that serve as highways for transporting blood which contains life-sustaining molecules, such as nutrients, gasses, hormones and waste products, to the various organs of...

Experts use veins to draw blood for blood testing, blood donation, and more because the structure and position of veins make it easier to draw blood out of as compared to arteries. It may also be dangerous to draw blood from arteries.

A substance in which the concentration of oxygen is elevated is said to be oxygenated.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

What is it in our blood that makes it red, and why are other animals different? Biology - Human Body - Learning Points. Haemoglobin is the most efficient oxygen carrier and provides the red pigment in blood. Not all animals have red...

We dissect and examine a cow\u2019s heart to show the position and function of different parts. This includes the coronary artery, ventricles, atria, pericardium and the thickness of the muscle tissue. Biology - Human Body - Learning...

This video covers the structure and function of the heart, the double circulatory system, the associated blood vessels, pacemaker cells and the coronary arteries.

The circulatory system is a vast, complex network of blood vessels that serve as highways for transporting blood which contains life-sustaining molecules, such as nutrients, gasses, hormones and waste products, to the various organs of...

From science to style, the belly button has long played a prominent role in human development and culture. Learn about the medical and cultural significance of this scar left from the umbilical cord severed at birth.

This is an educational video that explains the structure and function of the heart and blood vessels in the human body, as part of the circulatory system. The video provides detailed explanations of the chambers, valves, and blood...

The human body is a wondrously complex machine made of flesh, bone, muscles, organs, blood vessels and highly specialized systems that function together to sustain life. This fascinating third part of The Human Body series examines the...

Experts use veins to draw blood for blood testing, blood donation, and more because the structure and position of veins make it easier to draw blood out of as compared to arteries. It may also be dangerous to draw blood from arteries.

Now that we understand the structure and function of the heart, which is to pump blood all around the body, what is the blood traveling around in exactly? Those would be blood vessels. There are many kinds, like arteries, arterioles,...

Anatomy and function of the left and right pulmonary arteries.

Anatomy and function of the right and left pulmonary veins.

In this video, we explore the anatomy of fetal circulation and important, relevant structures.

The circulatory system works to transport oxygen and nutrients to cells in your body, while removing waste products (such as carbon dioxide) at the same time. This system is actually a double circulatory system, made of two circuits -...

Ever wonder what causes the thump-thump sound of your heartbeat? It’s all to do with the valves. The sound of your heart beating can be attributed to your valves closing, and always in specific pairs. Separating the atria from the...

The main job description for this muscular organ is to pump oxygenated blood throughout your body... from the top of your brain to the tips of your toes… in fact, your heart transports all your blood around your body about 1000 times a...