4.3, 17.1-2 histology of blood Flashcards
blood _ substances inside the body
transports
connective tissue is supplied richly with __
blood vessels
cartilage is vascular/avascular
avascular
hemopoietic stem cell
the connective tissue’s immature blood-cell forming type
fluid matrix
plasma
blood
fluid withing blood vessels
why is blood classified as connective tissue?
is develops from mesenchyme
consists of blood cells, surrounded by fluid matrix (blood plasma)
“fibers” of blood
soluble protein molecules that precipitate
forms visible fiberlike structures during blood clotting
blood carries:
-nutrients
-wastes
-respiratory gases
-other substances
arteries
carries blood out of the heart
capillaries
small branches off arteries that service all tissues of the body
veins
carries blood back to the heart
buffy coat
thin, whitish layer of blood present at the erythrocyte-plasma junction
-includes leukocytes and platelets
hematocrit
percentage of erythrocytes in a blood sample
-usually 45%
blood plasma
straw-colored, sticky fluid
-90% water
-contains over 100 dissolved solutes
plasma proteins
most abundant plasma solutes
produced by the liver
albumin
major blood protein contributing to the plasma osmotic pressure (helps keep water in the bloodstream)
-accounts for 60% of plasma protein
-acts as a carrier to shuttle certain molecules through the circulation
erythrocytes have no:
nuclei or organelles
plasma is also called
background of the tissue (extracellular matrix)
plasma is made of
water, solutes, protein
histology
study of tissues
tissue is made of
cells
the extracellular matrix
cytology
study of cells
photomicrograph
picture taken using microscope (microscopic anatomy)
blood is stained with:
wright stain (dyes the cells)
peripheral blood smear
blood on a microscope slide
in the blood cell
erythrocytes - carries gases from blood marrow
leukocytes - less common, larger, has nucleus, fights invasions
neutrophil - leukocytes that first responds to pain (phagocyte and releases chemicals)
phagocyte - eats infections
basophil - leukocyte that releases histamine (causes inflammation)
thrombocytes - fragments of cells, fills microtears
platelet plug
group of platelets that plug microtears to stop blood loss
hemostasis
stop blood loss
extracellular matrix/plasma
background behind cells in blood
clot formation
proteins form ‘fibers’
sickled cells
red blood cells are in a crescent shape
leukemia is caused by
irregular white blood cells