50000 is not as much as the earth. So 0
muscular vessels that connect the dorsal and ventral blood vessels.
air particles, the earth around the sun, and the blood in your blood vessels
There are more than 100,000 km of blood vessels in the human body, enough to encircle the earth 2 1/2 times if they could be placed end-to-end.
The equator, around Earth's total circumference as a sphere.
You heart pumps blood to every cell in you body by way of blood vessels. It seem impossible but each cell needs blood to go by it so it can pick up oxygen and nutrients and drop of carbon dioxide and wastes. All the blood vessels of the human body have a total length of 100,000 km (62,000 mi): they could encompass the Earth by 2.5 times.
6600
It is a circle because, the earth is a circle, and the equator stretches all the way around the earth.
Any circle on the Earth's surface whose center is at the center of the Earth is called a "great circle". Any circle with its center anywhere else is called a "small circle". Spiritually, many consider the kaaba (Mecca) to be the center of the Earth's surface.
YES. A small circle is simply a circle around the earth that does not fly over the direct opposite place on earth that a plane took off from. A great circle goes full circumference of earth, where a small circle does not. Being a circle they both fly in a constant direction.
the earth is a sphere but if you look at it as a 2d shape it is a circle
A great circle lies in the plane that includes the center of the Earth. The plane of a small circle doesn't include the center of the Earth.
An earthworm has a circulatory system consisting of four or more ventral blood vessels and one dorsal blood vessel that is also its heart. Most of the pumping of blood is performed by general muscular movements.