1. The Circulatory System

2. Function Transport nutrients and O2 to the cells
Transport CO2 to lungs
Regulate/distribute heat from hot spots (liver, brain) to the rest of the body
Regulate pH of tissue fluid
Circulate hormones
Create blood clots to seal wounds
Fight infection

3. The Circulatory System
Three main Components:
Blood: Type of connective tissue made up of cells and liquid, carries both nutrients and wastes.
Heart: The pump
Blood Vessels: The pipes

4. Non-Human Circulatory Systems
Open Circulatory Systems:
Many invertebrates
Blood is not contained within blood vessels
E.g. Grasshopper
Tubular heart pumps blood through vessels that open into spongy chambers called sinuses.
In the sinuses, the blood bathes the body tissues then collects in another set of sinuses to return to the heart.
Closed Circulatory Systems:
Contained within blood vessels
More efficient because blood can be pumped under higher pressure