|
|
Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.