Erythrocytes

composition of erythrocytes

water and hemoglobin

erythrocyte membrane is

semiflexible, can change shape and expand but is not fully elastic and can rupture

erythrocytes are anuclear in

domestic species

erythrocytes are nuclear in

fish, birds, and reptiles

erythrocytes are biconcave with a

central pallor

central pallor is the

pale area

more biconcave means

prominent central pallor

canines have a prominent

central pallor

erythrocyte size varies by

species

dogs erythrocytes are

larger

what species have smaller erythrocytes

sheep and goats

domestics erythrocyte shape

round

deer erythrocyte shape

sickle shaped

camelids erythrocyte shape

oval

average lifespan of erythrocytes is

120 days

erythron

concept of blood as a body system

erythron includes

circulating RBCs, precursors, organs involved in production and destruction of RBCs

erythrocytes stay balanced

production = destruction

blood tests include

RBC count, PCV, hemoglobin content, RBC morphology, RBC indices

indices includes

size and volume

RBCs originate in

bone marrow

fetal RBCs

starts in yolk sac, liver and spleen become involved, eventually bone marrow is involved

Neonatal RBCs

bone marrow is major site of production

red bone marrow

actively producing RBCs and recedes as matures

yellow bone marrow

inactive

adult RBCs

red bone marrow resides in flat bones like sternum, ribs, pelvis

bone marrow is made of

thick cells

bone marrow contains small blood vessels that

deliver nutrients and transport cells out

PSC

primitive stem cells

primitive stem cells are origin of

WBCs, RBCs, and platelets

PSC needs

adequate nutrients

bone marrow can be stimulated to

increase RBC production