# data[].attributes.body
Fluid stays in vessels at all times

# data[].attributes.body
Fluid can leave the vessels

# data[].attributes.body
Blood passes through the heart once (systemic circuit) e.g. fish

# data[].attributes.body
Blood passes through the heart twice and has 2 circuits around the body:
Pulmonary – from the heart to the lungs to the heart
Systemic– from the heart to rest of body to heart

It passes through once as deoxygenated blood before being pumped to the lungs.

It then passes through again as oxygenated blood before being pumped to the rest of the body.

# data[].attributes.body
Blood cells are formed from stem cells in the bone marrow, they then form into the different types of blood cells needed in the body

# data[].attributes.body
The liquid part of the blood, straw yellow in colour, it holds the blood cells (suspends them)

# data[].attributes.body
- No nucleus
- Become activated and change shape once activated
- Works with clotting factors to assist blood clotting

# data[].attributes.body
- Biconcave disc; larger surface area
- No nucleus
- Flexible
- Carry Heomoglobin (Oxygen)

# data[].attributes.body
- Have a nucleus
- Large
- Some have antibodies on the surface
- Immune response