hemoglobin definition by Wordo

Noun

The

iron-containing

substance

in

red blood cells

that

transports

oxygen

from

the

lungs

to

the

rest

of

the

body

;

it

consists

of

a

protein

(''

globulin

''),

and

''

haem

'' (

a

porphyrin

ring

with

an

atom

of

iron

at

its

centre

).