File:The animals and man; an elementary textbook of zoology and human physiology (1911) (14598145309).jpg

Identifier: animansmanelemen00kell (find matches)
Title: The animans and man; an elementary textbook of zoology and human physiology
Year: 1911 (1910s)
Authors: Kellogg, Vernon L. (Vernon Lyman), 1867-1937 McCracken, Mary Isabel
Subjects: Zoology Physiology
Publisher: New York, H. Holt and company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
e presence of their
enemies and the proximity of their mates and companions.
The organs of smell of insects are situated principally on

THE ANIMALS AND MAN

the antennae or feelers (fig. 29), a single pair of which is borne
on the head of every insect. That many insects have an
amazingly keen sense of smell has been shown by numerous
experiments, and is constantly proved by well-known habits.
Hearing is the perception of cer-
tain vibrations of bodies. These vi-
brations give rise to waves—sound-
waves as they are called—which
proceed from the vibrating body in
all directions, and which, coming to
an animal, stimulate the special au-
ditory organs, which transmit this
stimulation along the auditory nerve
to the brain, or nerve ganglion,
where it is translated as sound. These
sound-waves come to animals usu-
ally through the air, or, in the case
of aquatic animals, through water, or
through both air and water. The
organs of hearing are of very com-
plex structure in the case of man and
the high-er verte-
brates.
Our ears
(Fig. 30)
which are
adapted for perceiving or being stimu-
lated by vibrations ranging from
1 6 to 40,000 a second — that is,
for hearing all those sounds pro-
duced by vibrations of a rapidity
not less than 16 to a second nor

Text Appearing After Image:


FIG. 29. The antenna of
a carrion beetle, with
the terminal three seg-
ments enlarged and flat-
tened and bearing manys
melling-pits. (Much
enlarged; photo-micro-
graph by Geo. O. Mitch-
ell.

Note About Images