What is the major and minor portion of the circulatory system?
Blood-vascular system: Major Minor( Major, Minor )
Lymphatic system: Minor Major( Minor, Major )

Arteries: Carries blood away from back toward( away from, back toward ) the heart
Veins: Carries blood back toward away from( back toward, away from ) the heart

Systemic circulation Pulmonary circulation( Systemic circulation, Pulmonary circulation ): Carries oxygenated blood to the organs and tissues
Pulmonary circulation Systemic circulation( Pulmonary circulation, Systemic circulation ): Takes blood to the lungs for CO2 exchange and for the reoxygenation of blood

Through the thin walls of the capillaries arteries veins( capillaries, arteries, veins ), the blood discharges CO2 and absorbs oxygen from the air contained in the alveoli bronchioles bronchus body( alveoli, bronchioles, bronchus, body ). The oxygenated deoxygenated( oxygenated, deoxygenated ) blood passes onward through the pulmonary veins for return to the heart.

Deoxygenated blood is transported by the pulmonary arteries veins arterioles venules( arteries, veins, arterioles, venules ), and oxygenated blood is transported by the pulmonary veins venules arteries arterioles( veins, venules, arteries, arterioles ).

Because of the force required to drive blood through the extensive systemic vessels, the myocardium is about three times as thick on the left right( left, right ) side (the arterial venous( arterial, venous ) side) as on the right left( right, left ) (the venous arterial( venous, arterial ) side).

Internal carotids Basilar Vertebral arteries( Internal carotids, Basilar, Vertebral arteries ) bifurcate into anterior and middle cerebral arteries
Basilar Internal carotids Vertebral arteries( Basilar, Internal carotids, Vertebral arteries ) bifurcates into right and left posterior cerebral arteries
Vertebral arteries Internal carotids Basilar( Vertebral arteries, Internal carotids, Basilar ) unite to form basilar artery