REPRODUCTION AND GERM DEVELOPMENT OF HUMANS AND ANIMALS...continued

Reproduction of Man and Animals:
A series illustrating reproduction from protozoa to man. It will therefore not only be an invaluable aids in biology classes but equally valuable for teaching sex instruction. The beautiful anatomical picture plates have been made by university illustrators specialising in this field. - Asexual reproduction (division) of Amoeba - Asexual reproduction (budding) of Hydra - Sexual reproduction of Hydra - Reproduction of the sea urchin (Echinus) - Fertilization of the sea urchin egg - Reproduction in fishes - Reproduction in salamanders - The female reproductive organs of reptiles, birds, and mammals - The reproductive organs of the human male; lateral view of situs - Ditto; diagram - Testis, t.s., low magnification - Seminiferous tubules showing spermatogenesis; t.s. - Testis, epididymis, spermatogenesis; diagrams - Sperm smear of bull - Human hair, egg, and spermatozoa; comparison of sizes - The reproductive organs of the human female; lateral view of situs - Ditto; front view of situs - Ovary; t.s., low magnification - Egg development: primary follicle - Egg development: secondary follicle - Egg development: early stage of Graafian follicle - Egg development: mature Graafian follicle with germ hillock and egg cell - Egg development: mature ovulated egg with corona radiata - Corpus luteum - Human fallopian tube t.s. - Ciliated epithelium of the Fallopian tube; t.s., high magnification - The yolk sac and the embryonic development of fishes - The embryonic membranes of chicken - The embryonic membranes of mammals and humans - Wall of human uterus, t.s. - Changes of the endometrium during menstrual cycle and after fertilization - Oogenesis, ovulation, fertilization, cleavage of fertilized egg, and implantation of blastocyst in the uterine wall - Growth of embryo and foetus in the uterus, 4 stages - Structure and function of the placenta, diagram - Foetus in uterus showing placenta, umbilical cord, and amniotic cavity - Full term baby in maternal abdomen, normal cephalic presentation - Beginning of birth, entrance of amniotic sac into the birth canal

Germ Development of Man and Animals:
Starting with the fertilization of the egg and the fusion of the two haploid nuclei, the various types of egg and corresponding types of cleavage are shown. The gastrulation, neurulation and formation of germ layers in Branchiostoma, frog and human beings are then illustrated. - Fertilization of the Ascaris egg, entering of a sperm I. The beginning of embryonic development - fertilization - Fertilization of Ascaris egg, entrance of spermatozoon in the oocyte - Mature oocyte of Ascaris with male and female pronuclei, each nucleus contains two chromosomes. - II. Cleavage - Metaphase of the first cleavage of Ascaris, equatorial plate in side view shows chromosomes, spindle fibres, centrioles - Telophase of the first cleavage of Ascaris, division of the cell body - Total equal cleavage: 2-, 4-, 8-cell stage, morula - Types of eggs and patterns of cleavage I: as far as the 8-cell stage - Types of eggs and patterns of cleavage II: morula and blastula - Blastula of sea urchin (Echinus), after total equal cleavage - Blastula of frog (Rana), after total inequal cleavage - Insect, blastula after superficial cleavage - III. Gastrulation - Gastrulation of sea urchin, Echinus, diagram - Gastrula of sea urchin, Echinus, photomicrograph - IV. Neurulation - Organogenesis in frog and chicken - Neurulation in Amphioxus, t.s. diagram - Neurulation in frog, anterolateral and dorsal view, diagram - Neurulation in frog, t.s. - Neurula of frog, t.s. - Neurula of frog, mid-dorsal region, t.s., detail - Neurula of chicken, t.s. - Chicken embryo 33 hours of incubation, l.s. - Frog embryo, tail bud stage, l.s. - Frog embryo, tail bud stage, t.s. - Frog larva, 3 days after hatching, l.s. - Frog larva after hatching, t.s. - Frog larva, t.s. of heart region - Chicken embryo, 48 hours, t.s. - Chicken embryo, 72-hours, l.s. - Chicken embryo, 72-hours chick, embryonic disc with circular system injected - Chicken, older embryo, l.s. - V. Organogenesis in humans, Summary - Median l.s. through a human embryo - Development of the human heart, t.s. of three stages - External changes in the human heart, ventral view - Development of human lungs, t.s. of 6 weeks old embryo - Stages of human pulmonary development - Development of the human eyes, four stages - Head of mammalian embryo, sagittal section showing eyes - Mammalian embryo, median sagittal section of whole body with primordia of organs.