The human circulatory system

basic unit of life

• cell
• capillaries
• heart valve
• vein

in order to get fresh oxygen, dispose of carbon dioxide, and get new sugar for cells, the circulatory system has to connect with the intestines and these

• heart
• vessels
• lungs
• veins

arteries, veins, and capillaries are three types of __________

• heart valves
• blood vessels
• cells
• veins

The human heart is a ____-chambered organ.

• 1
• 2
• 3
• 4

a structure that acts as a one-way gate

• left ventricle
• right ventricle
• heart valve
• lungs

blood flows back to the heart in these

• cytoplasm
• lungs
• circulatory system
• vein

the system of blood vessels and the heart

• circulatory system
• heart valve
• right atrium
• vein

when the heart beats after the blood is in the left atrium, it squeezes blood into this powerful part

• heart
• left ventricle
• right ventricle
• lungs

when the heart beats, the right atrium squeezes blood down the right side of the heart

• heart
• left ventricle
• right ventricle
• lungs 

Which is responsible for providing oxygen to cells?

• respiratory system
• circulatory system
• muscular system
• nervous system