Comparing Vessels
The blood vessel that carries the blood away from the heart is _______.
Artery
The middle layer of artery walls is _______.
Muscle
The walls of veins are ___________than arteries.
thicker, thinner, no difference, less layers
thinner
Nutrients are exchanged between the blood and the body cells in the ____________.
capillaries
The alternating expansion and relaxation of the artery in your wrist is your _______________.
pulse
The blood vessel that carries the blood back to the heart is _______________.
Vein
The innermost layer of the artery are the ________ cells.
Epithelial
Why does the blood flow in the veins have less force than arteries?
The blood is farther away from the heart's push.
The narrowest blood vessels are the _________.
capillaries
The process where molecules move from an area from high concentration to an area of lower concentration.
diffusion
The vessel that exchanges materials from the blood and body cells is ______________.
Capillary
The layer of ________ in the artery control the amount of blood sent to different organs.
muscles
Which one of the following is not a characteristic of a vein?
valves prevent backward flow of blood
walls are one cell thick
skeletal muscles help push the blood along
breathing movements help force blood to the heart
walls are one cell thick
Cellular waste products travel from cells, through the capillary walls, to the __________.
blood
The order of the blood coming from the heart to all the vessels is:
capillaries-veins-arteries
veins-arteries-capillaries
arteries-capillaries-veins
arteries-capillaries-veins
The vessel with the thickest walls is _________.
Artery
When the walls of the artery becomes narrow, it does what to the blood flow?
decreases
Veins carry what materials to the heart?
carbon dioxide or waste material
Why are capillaries the smallest vessels?
They carry and take materials from each cell.
What is the name of the instrument that measures your blood pressure?
sphygmomanometer
The vessel that has walls that are made of 1 cell layer is______.
Capillary
The outer layer of the artery's wall is made of _____________, which makes it flexible.
connective tissue
What are the layers of the walls of a vein?
epithelial cells, smooth muscle, and _______
connective tissue
Why are the walls of a capillary only one cell thick?
To allow for diffusion
When you count pulse beats, you are also counting _________.
heart beats