A vessal that carries blood TO the heart
What are characteristics of veins?
1. Returns blood TO heart 2. Walls are thinner than arteries 3. There are valves that prevent blood from going backward
What causes blood to move in arteries?
The pumping force of the ventricles when they contract
What causes blood to move in veins?
1. contracting skeletal muscles 2. breathing movements in chest
3 layers of artery wall
Inner- smooth epithelial, Middle- muscle tissue Outer- connective tissue
An instrument that measures blood pressure
tiny vessals where oxygen moves from red blood cells into the body cells
Caused when ventricles contract
Why are artery walls thick?
To withstand force of blood pumped out of heart
The process where molecules move from an area of high concentration to low concentration. Ex- glucose diffuses from blood, through cappilary wall, into body cells