Blood supply and Innervation

Blood supply of lungs

plays an important role in gas exchange

inneravation of the lungs

by both the sympathetic and parasympathetic nervous systems

provides an important level of control through dilation and constriction of the airways

blood supply contains

deoxygenated blood that travels to the lungs by erythrocytes (red blood cells) that pick up oxyge4n

pulmonary artery

an artery that arises from the pulmonary trunk and carries deoxygenated blood to the alveoli

branches multiple times and gets smaller as it follows the bronchi

arteries become capillaries as they reach the alveoli

One arteriole and one venule supply

drain one pulmonary lobule

Capillaries

branches and follows the bronchioles to alveoli

Respiratory membrane

where eventually the capillary wall and alveolar wall meet

Once blood is oxygenated ____

it drains to the pulmonary veins and exits the lungs through the hilum

Parasympathetic nervous system

causes bronchoconstriction

Sympathetic nervous system

Causes bronchodilation

Results of the autonomic nervous system’s control

Reflexes like coughing

Lungs ability to regulate gas levels

sensory nerves

arise from the vagus nerve and the 2-5 thoracic gagalia

pulmonary plexus

a region on the lung root formed by the entrance of nerves at the hilum