Bio: Circulatory

Respiratory gases, nutrients, waste products, hormones, antibodies, salts and heat

To maintain body temperature in Endothermic animals and transfter heart when obtained in Ectothermic animal

Arteries and veins run parallel to each other So heat from the arteries (coming from the core) is transferred over to the veins.

• 1) Circulating fluid
• 2) A propulisve organ
• 3) Vascular system (vessels, capilaries ext)

Low blood pressure and blood flow

The open system has a slower return of blood to the heart

Both systems do

Only the closed system

The open system

Incomplete system of vessles

Enclosed system of vessles

High blood pressure and blood flow

Closed system

• 1) Control of the velocity and distribution of blood flow
• 2) Allows increases in metabolic rate & body mass
• 3) Lead to the evolution of the complex kidney

• 1) Higher blood pressure to body
• 2) increased metabolic reate
• 3) increased body mass

The systemic and pulmonary circuits

• 1) increased oxygen uptake
• 2) higher blood flow and pressure
• 3) more seperation between oxygenated and deoxygenated blood

• Sinus venosus
• Atrium
• Ventricle
• Bulbus Arteriosis or Conus Arteriosis

Conus arteriosis

• 1) Division of the heart is more complete
• 2) Partial septum dividing the atrium and ventricle
• 3) Spiral folds in the bulbus cordis