Human Respiration
Name: ______________________ Date: ____________
Write the missing letters on the lines to finish each word.
1.
r
a
c
h
a
One of the tubules forming the respiratory system of most insects and many arachnids
3.
c
a
l
a
r
i
s
Any of the minute blood vessels connecting arterioles with venules (plural)
4.
b
o
c
i
o
l
e
Any of the smallest ___ ducts
6.
x
g
e
n
Gas in the air that we need to breathe
7.
b
r
c
h
s
Either of the two main branches of the trachea
8.
u
n
s
Either of two saclike respiratory organs in the chest of vertebrates (plural)
9.
c
o
n
d
o
x
i
d
e
A heavy odorless colorless gas formed during respiration and by the decomposition of organic
10.
e
p
i
o
t
i
s
A flap of cartilage that covers the windpipe while swallowing
14.
a
s
t
h
Respiratory disorder characterized by wheezing
15.
e
p
h
y
e
a
An abnormal condition of the lungs marked by decreased respiratory function
16.
i
a
p
h
r
a
A mechanical device in a camera that controls size of aperture of the lens
17.
b
r
n
c
h
i
s
Inflammation of the membranes lining the ___ tubes
19.
a
n
e
r
Serious disease where cells grow out of control
20.
u
c
s
Protective secretion of the mucous membranes
21.
p
n
e
u
m
n
Respiratory disease characterized by inflammation of the lung parenchyma with congestion caused