Circulatory System

What is the circulatory system?

How many types of blood vessels are there?

Name them.

What is a capillary?

What is an artery?

What are veins?

What is a bruise?

How does a bruise occur?

What is a heart?

What is a heart made out of?

How big is the heart?

Where is the heart located?

Does cardiac muscle get tired?

How does the cardiac muscle keep it's energy flowing?

How many phases of a heartbeat are there?

What is the first stage?

What is the second Stage?

What is the last stage?

Is Blood an organ?

Fill in the blank

The average sized adult has __ Litres of blood.

What are red blood cells?

What are white blood cells?

What is Plasma?

What are Platelets?

What do platelets help do?

What can a too much of a blood clot cause?