what is the two lower chambers of the heart that contract at the same time that the heart beats

what is coranay circulation

what is a flow of blood through the heart and lungs then goes back to the heart

what is the largest part of the circultory system

what are blood vessels away from the heart beat

what are blood vessels that take blood back to the heart

what are the microscopic blood vessels that connect arteries and veins

what is the liquid part of blood vessels

what are the chemicals in red blood cells that carries oxygen from the lunges to the body cells

what are the shapes cell fragments

what si the organ that circulates blood through your body continunsly

what are structures that included arteries, veins, and capillaries ,which transport blood