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A series of pregnant mammals are dissected to expose the foetus in each. The uterine/chorionic connections are examined in detail.
Metadata describing this Open University video programme
Module code and title: S321, Physiology of cells and organisms
Item code: S321; 09
First transmission date: 09-06-1974
Published: 1974
Rights Statement:
Restrictions on use:
Duration: 00:23:33
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Producer: Roger Jones
Contributor: Richard Holmes
Publisher: BBC Open University
Keyword(s): Dissections; Electron micrographs; Marsupial frog; Midwife toad; Placenta; Surinam toad; Viviparity
Footage description: Richard Holmes cites several examples of viviparity in lower vertebrates. Still shot of male and female midwife toads (Alytes obstetricans). Male is nursing the eggs. Still shot of a Surinam toad (Pipa pipa) showing young toads emerging from pits on the mothers back. Film shots of the marsupial frogs (Motorama gasthrotheca marsupiata). 2 pairs are shown mating. Shots of male pushing fertilised eggs into the female's pouch. Shots of female releasing hatched eggs from her pouch into the water. Richard Holmes with pig genitalia. He dissects the uterus to expose the piglet. As he dissects he points out both maternal and fetal tissue. Richard Holmes dissects the uterus of a mare to expose the foal. He points out the uterine/chorionic connection and other tissue as he dissects. Richard Holmes dissects a sheep uterus to expose the young. He points out the uterine chorionic connecton and other tissue. Holmes examines the otvctiledons in some detail. Holmes with a partly dissected dog uterus. He exposes part of the pup. The placenta a zonary placenta, is pointed out and its characteristics discussed. Holmes with a model of a human womb showing a baby shortly before birth. He points out the various parts particularly the placenta. Holmes with an actual human placenta just after birth. He describes its characteristics. Richard Holmes examines a sheep chotiledon in detail. He uses diagrams and electron micrographs to study the uterine/chorionic function. Holmes then goes on to examine electron micrographs of the uterine/chorionic function for mares, dogs and humans.
Master spool number: 6HT/71401
Production number: 00525_1113
Videofinder number: 1826
Available to public: no