closeup

examination

erythrocytes

structure

function

red

blood

cells

human

circulatory

system

cellular

biconcave

shape

oxygen

transport

hemoglobin

flow

oxygenation

delivery

vessels

capillaries

arteries

veins

components

exchange

absorption

plasma

cell

count

health

cardiovascular

binding

metabolism

circulation

physiology

distribution

analysis

morphology

carriers

uptake

vessel

respiration

vascular

levels

saturation