Circulatory System

Front

The structure responsible for pumping blood throughout the body is

Back

the heart

Front

How many chambers does the human heart have?

Back

four

Front

What are the flaps of tissue found in veins, that prevent blood from flowing backward?

Back

valves

Front

What are the 4 blood groups?

Back

A, B, AB, O

Front

These structures located between the 2 atrium and the 2 ventricles that keep blood flowing in ONE DIRECTION are called

Back

valves

Front

A group of cells located in the right atrium responsible for sending signals to other chambers causing them to contract is

Back

pacemaker

Front

The alternating expansion and relaxation of the artery wall caused by contraction of the left ventricle is

Back

pulse

Front

Which component of blood makes up the majority (highest percent)?

Back

plasma

Front

An iron-containing protein found in red blood cells is

Back

hemoglobin

Front

Platelets are important for which process?

Back

clotting