Download Alveoli

7th Grade
Unit 5:
The Structure and Function of
Body Systems
Lesson 3:
Respiratory and Circulatory
Systems, and Flow of Blood
Vocabulary of Instruction:
Alveoli
• Tiny sacs of
lung tissue
specialized
for the
movement
of gases
between the
air and the
blood.
Arterioles
• The smallest
divisions of
the arteries
located
between the
muscular
arteries and
the capillaries.
Capillaries
• Tiny little
venules or
vessels between
the arteries
which carry
blood from the
heart and veins
back to the
heart.
Diaphragm
• A large,
domeshaped
muscle that
has an
important
function in
breathing.
Hemoglobin
• Substance in
red blood
cells which
conveys
oxygen from
the lungs to
body
tissues.
Platelets
• Tiny
membranebound cell-like
particles found
in blood that
carry materials
important for
the formation
of clots.
Trachea
• The windpipe of
the respiratory
system.
Venules
• The minute
vessels that
collect blood
from the
capillary
plexuses and
join together
to form veins.
The Whole Picture