What do veins look like?



Veins are blue they have thin walls and are like tubes they are sort of like spaghetti. And they have three layers one outer layer of tissue one middle layer of muscle and one layer smooth inner layer of epithelial cells. Blood with little oxygen is a bright red and blood with lots of oxygen is a dark red. There are more veins then arteries also veins are thicker than arteries.   


What do veins do?


Veins take blood with no oxygen back to the heart veins transport blood at a lower presser than arteries receive blood from the capillaries after the exchange of oxygen we also need vain valves to keep blood flowing against gravity and to the heart.


What do veins connect to?


Veins connect to pretty much every thing but mostly the lungs and heart.


Where are veins in the body?

Veins are everywhere in the body


Are there different types of veins?


Yes there are 6 types of veins but there are three main veins and they are:


The Pulmonary Veins contain arterial blood, which they return from the lungs to the left atrium of the heart.


The Systemic Veins return the venous blood from the body to the right atrium of the heart.


The Portal Vein is found in abdominal cavity, and returns the venous blood from the spleen to the liver. It forms a small network of capillary-like vessels, from which the blood is carried.


Research by Curtis