BIO 50B - Lab Unit 3

Heart anatomy

Cardiac muscle

involuntary, mitochondrial density, intercalated discs.

intercalated discs result in

gap junctions between cells called electrical synapses that make Connexon proteins

atria

two superior atria (right and left) where blood enters the heart via veins

ventricles

two inferior ventricles (right and left) where blood exists the heart out of arteries

autorhythmic cells (pacemaker cells)

modified muscle cells (noncontractile); unstable membrane potential

What does it mean when a patient is asystole?

Heart is not contracting; their heart is not beating.

sa (sinoatrial) node

makes atrium contract

left atrium receives blood from

oxygenated blood from the lungs and pulmonary veins

valves

prevent backflow of blood

most abundant solute in blood plasma

plasma proteins (Albumin, immunoglobulins)

circle of Willis

basilar artery, cerebral arteries (6), communicating arteries (3)

name the white blood cell

neutrophil

name the leukocyte

eosinophil

name the leukocyte

basophil

name the leukocyte

lymphocyte

name the leukocyte

monocyte