ZOOLOGY FUNDAMENTALS

The prolific use of detailed artwork intro-
duces the many worlds of zoological
science and the classifications that syste-
matize its diversity. Discounts of 25% or
more on bundled sets.

EMBRYOLOGICAL DEVELOPMENT
Expand your slide collection with these classic studies of embryological chicks, frogs, echinoderms and humans. 5 programs. 104 slides and guides.
EP #622X SLIDES
$149.95

****************************************************************************************************************
SAVE OVER $54.00 ON 5 SLIDE SET BUNDLE ORDER #622X.......$149.95
****************************************************************************************************************

CHICK EMBRYOLOGY: 33 AND 48 HOURS Order #622.....$42.50

The appearance of the chick embryo during the second day of incubation is
presented in views of whole mounts and representative sagittal and transverse sections
through key regions of the embryonic body. Primordia of the major organs are
established during this time. Ink-injected specimens are included to emphasize the
degree of development of the cardio-vascular system. 2O slides and guide.

REVIEWS: "...these slides effectively depict the chick embryo at two stages of
incubation and demonstrate the developmental stages of significant organs and systems. For
high school and college biology." Booklist.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

CHICK DEVELOPMENT Slides order #SS-0145S......$44.95

Color photomicrographs depict the various stages of chick development--at 16,
24, 33, 48, and 72 hours. Strategic cross sections from each developmental stage are
included. 24 frames and guide. (Filmstrip order SS-0145F...$15.00.)

CONTENT SAMPLE: 3. The developing embryo needs nutrients throughout the
gestation period. These are supplied by the yolk, the yellow mass shown to the left in this
opened egg (about 3 days after fertilization). The dark spot is the eye of the developing embryo.
As in other large zygotes, cleavage is incomplete and in this case restricted to a small area on
the yolk called the blastodisc.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ECHINODERM DEVELOPMENT Slides order #SS-0150X....$49.95

Photomicrographs depicting the developmental history and metamorphosis of
the sand dollar, sea urchin and starfish. 30 frames and 3 guides. (Filmstrips order
SS-0165X ......$15.00.)

CONTENT SAMPLE: 9. The cells pushing into the blastocoel through the blastopore
form a new cavity, the gastrocoel or archenteron, that gradually replaces the blastocoel. The
embryo is now referred to as the gastrula. Two embryonic layers are discernible in this late
gastrula, the ectoderm that forms the outside covering of the gastrula and which will later form
the body covering, and the endoderm that forms the lining of the gut tube and some organs.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

FROG DEVELOPMENT Order #SS-0460S....$24.95

Basic anuran embryology; induction and related phenomena. 1O frames and
guide. (Filmstrip order SS-0460F.....$15.00.)

CONTENT SAMPLE: 1 Frogs’ eggs are fertilized externally. As soon as a sperm
enters an egg, a gelatinous envelope appears around the zygote. Seen here is a group of
newly-fertilized eggs. Note that there are two basic parts: The lighter-colored portion (the vegetal
hemisphere) contains yolk material and is denser than the other, darker portion (the animal
hemisphere, destined to become the embryo proper). Freely movable in the gel, the egg “rights
itself” gravitationally. Already at this stage part of the embryo-to-be is distinguishable with special
methods. The gray crescent, an area of cytoplasm on one side of the egg in the animal-vegetal
margin, will play an important role later on in directing embryological changes.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

HUMAN DEVELOPMENT Slides order #SS-0235S....$42.50

Full color graphics depict the process of ovum development, fertilization, fetal
development, and birth. 20 frames and guide. (Filmstrip order SS-0235F....$15.00.)

CONTENT SAMPLE: 7. Implanted in the uterus, the embryo begins to develop
extraembryonic membranes. Lower left: One month embryo. The green structure is the “yolk
sac,” which actually contains no yolk. The line encircling the embryo and its surrounding fluids is
the amnion. Surrounding the entire structure is the placenta, an organ made of both embryonic
and maternal tissues. Lower center: Two-month embryo. Here the amnion has increased, the
yolk sac decreased, and the umbilicus has become more distinct. The chorion is the membrane
just inside the placenta. The pink area extending to the placenta contains the allantois which
acts as a waste dump and is incorporated into the umbilicus. Lower right: Three-month embryo.
By this time fetal circulation is being established with the placenta through the umbilicus.

***************************************************************************************************************
RELATED PROGRAMS WORTH NOTING
***************************************************************************************************************

HUMAN REPRODUCTION Slides order #SS-0250S......$42.50

Excellent full color graphics present a light once over on the basic reproductive
events of humans. Very useful for introductory presentations at all levels and for all
educational purposes. 2O frames and guide. (Filmstrip order SS-0250F....$15.00.)

CONTENT SAMPLE: 14. As the blastocyst contacts the uterus it implants. After
approximately 12 days it lies embedded completely in the uterine wall.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

THE BEGINNING Order #811......$42.50

Delivery of a baby by natural childbirth. Photos include pregnancy, prenatal
care, ultrasound exam, scenes in the labor and delivery rooms, early labor, predelivery
and delivery, the newborn child, initial care of the infant, foot printing, post partum care,
the mother and the child. 20 slides and guide.

CONTENT SAMPLE: 19120 As the months went by, I grew and grew and grew. I
experienced a strange sense of both inner and outer change and suddenly became aware that I
was not as spry and agile as before and could not pass through as small a space as previously.

For the reasons outlined earlier, we chose a delivery method known as psycho-
prophylaxis (prepared childbirth), first taught by the French obstetrician Fernand Lamaze. The
method uses two approaches: education about what to expect during labor and delivery,
including a tour of the hospital’s maternity area; and a variety of breathing exercises to be used
during labor and delivery to distract the mother’s conscious awareness of pain and help her to
relax. Lamaze also discourages the use of drugs and encourages the mother to be awake during
the delivery. Parents attend Lamaze classes together, practice the breathing exercises together
at home, and, in most hospitals, Lamaze-trained fathers are permitted to be present during labor
and delivery to assist the mother. Attending Lamaze classes during the last months of the
pregnancy helped prepare us for all that was to come.

REVIEWS: “Flexible packaging allows use...in the format most suitable for each
class. Recommended as an instructional tool...” Previews.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

CHILDBIRTH Slides order #SS-0660S.....$42.50

A selection of outstanding close up photographs of normal and Cesarean
deliveries from the obstetrician's view of an actual delivery. Guide provides details on
what mothers-to-be can expect. 2O frames and guide. (Filmstrip SS-0660F......$15.00.)

CONTENT SAMPLE: 6. Throughout the first stage of labor the uterus contracts and
relaxes in its attempt to expel the fetus. It is this process that is commonly called “labor.” The
frequency, duration and intensity of contractions increase as delivery nears, resulting in a
thinning out of the uterine wall, a process called effacement. During effacement the cervix
expands or dilates from its closed position to an open position, usually 8 to 10 cm in diameter,
thereby allowing passage of the baby from the uterus through the birth canal. Shown on the left
is an uneffaced uterus without dilation of the cervix, and at the right complete effacement and
dilation.

The second stage of labor follows uterine effacement and cervical dilation.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


~0723-013~ Embryologic development. graphic by Educational Images Ltd.

Copyright (c) MCMXCVII Educational Images Ltd., Elmira, NY, USA. All rights reserved.

EDUCATIONAL IMAGES LTD.

P.O.Box 3456 Westside Station

Elmira, N.Y., USA, 14905-0456

Telephone: 800-527-4264; 607-732-1090

Fax: 607-732-1183

E-Mail: edimages@edimages.com