Circulatory System

1. This system is made up of three systems.

1.1. Heart

1.1.1. Blood vessels

1.1.1.1. Blood

1.1.1.1.1. A liquid organ which is the medium of transport.

1.1.1.2. A network of tubes which carry blood around the body.

1.1.1.3. This is made up of 3 parts.

1.1.1.3.1. Artery

1.1.2. A four chambered muscular organ that pumps blood around the body.