Animation of the uterus and ovaries showing the changes that occur over the 28 days of the menstrual cycle. The cycle begins with menstruation (a period), during which the thick lining of the uterus is shed through the cervix and vagina. After this, rising levels of oestrogen promote redevelopment of the lining. In the ovary, fast-rising levels of luteinising hormone stimulate ovulation, the release of an ovum (pink), at day 14. This travels down the fallopian tube to the uterus. If it is not fertilised it degenerates within a day or so. The remaining part of the ovum's follicle in the ovary develops into a large yellow corpus luteum, which produces large amounts of progesterone. This in turn promotes new production of oestrogen, and inhibits LH and FSH production. Without LH and FSH the corpus luteum degenerates, and falling levels of progesterone and oestrogen lead to the spiral arteries in the endometrium atrophying, and the lining is shed at the start of the next cycle.

1960s: Demonstration of light rays bending through a lens.

1:12:57:24-1:13:10:19>>>BW MOS First miniature record player that plays new smaller diameter records is demonstrated. Records are the size that became 45rpm records at a later time. Record store and patrons are seen with salesman demonstrating phonograph.

Police rush to contain a Communist demonstration in New York City near City Hall during the Great Depression. Communist demonstrators confront policemen and are shoved by a cop . Policeman clubbing demonstrators in crowd. Police on horse back amongst demonstrators. Policeman escorts a demonstrator after arresting him. Policemen accost a resisting demonstrator. Cavalry police confront communist demonstrators. Communist demonstrator lying on the ground, below policemen's legs. Communist demonstrators disperse to avoid policeman. Location: New York City USA. Date: 1931.

00:00:00:00 [Peace demonstration]-- Man sings in front of crowd of demonstrators/ Israeli flag behind arrangement of flowers and candles :08/ man giving speech to demonstrators/ crowd shot of dem ...

No title - Anti-Vietnam war demonstration fails to be the 'October Revolution' feared. London. <br/> <br/>M/S crowd of demonstrators walking towards camera in Fleet Street. M/S Law Courts. Pan down to demonstrators in Fleet Street. M/S demonstrators in Fleet Street with Tariq Ali in the middle. Various shots of the demonstrators. L/S and M/S demonstrators burning Australian flag. M/S demonstrators holding banners. Various shots of demonstrators marching down Whitehall with banners. <br/> <br/>L/S crowds and police blocking entrance of Downing Street. C/U crowds outside entrance to Downing Street. M/S's police lined up. M/S as demonstrators walk down Whitehall. M/S mass of demonstrators passing Parliament. M/S fire bomb being let off. L/S demonstrators starting to run. Various shots demonstrators running down street towards Grosvenor Square. M/S demonstrators running madly towards camera. Various shots demonstrators clashing with police and fighting. M/S and L/S demonstrators walking arm in arm towards police. Various good shots demonstrators clashing with police.

ISRAELI ARMY UNITS IN JEEPS PASS BY DEMONSTRATORS. CU TV CAMERAMAN POINTS HAND HELD CAMERA AT DEMONSTRATORS. CU YOUNG FEMALE DEMONSTRATOR. CU DOG ON LEASH.

San Francisco, California - anti Vietnam War demonstration - moving pov past cu people - c/u demonstrators sit on low wall - protest - peace march - march anti-war, protest, demonstration - moving pov man with sign that reads bring our Boys Home - demonstrators sit or walk by

Bodybuilding Demonstration

In Washington DC, demonstrators voice their anger over the war in Iraq.

DEMONSTRATORS MARCHING AND CHANTING THAT THE US SHOULD GET OUT OF EL SALVADOR.

Demonstrations: night shots of young demonstrators in Quebec City waving flags, jumping and milling about, we see a plaque "Chateau Frontenac". Shot of organizer speaking to the crowd with a bull-horn. Shot of demonstrators marching past the camera in line abreast. Cut to two ELSs of a few demonstrators running into tear gas.

[Peace Demonstration & March in San Francisco]

NAME: TUR CLASHES 060305Nx TAPE: EF05/0205 IN_TIME: 10:11:27:04 DURATION: 00:02:39:00 SOURCES: APTN DATELINE: Istanbul - 6 March 2005 RESTRICTIONS: SHOTLIST Beyazid Square 1. Pan from riot police to demonstrators 2. Demonstrators holding red flags of "Democratic Women''s Movement'''' 3. Police putting on gas masks 4. Demonstrators with their fists in the air 5. Police with dogs 6. Demonstrators chanting 7. Police chasing and beating demonstrators who refused to leave, woman demonstrator on the ground 8. Policeman spraying gas at demonstrator, various of clubbing, a woman gets knocked over and kicked 9. Police running, tear gas 10. Injured demonstrator 11. Closer shot of injured demonstrator 12. Riot police chasing demonstrators 13. Shopkeeper shielding his face from gas Sarachane 14. Wide shot riot police and demonstrators gathered to join demo in Beyazid Square 15. Closer of police and demonstrators 16. Police chasing and beating demonstrators 18. Pan from women on the pavement to police clubbing demonstrator 19. Police clubbing demonstrator 20. Police arresting demonstrators 21. Zoom out from policemen to demonstrators being punched 22. Police carrying demonstrators to bus 23. Policemen dragging a demonstrator 24. Policemen and demonstrators in bus 25. Riot police lined up after the demo STORYLINE Turkish riot police on Sunday used truncheons and tear gas to disperse a group of leftist demonstrators who refused to disperse during an unauthorised demonstration in Istanbul to mark the upcoming World Women''s Day. Police called on the group of about 300 demonstrators to disperse and many of them left peacefully after chanting anti-government slogans. A group of about 100, however, refused to leave, prompting police to spray tear gas and charge on the group with truncheons. There were no immediate reports of any injuries. Earlier in the day, in another part of downtown Istanbul, police detained 48 people who were on their way to take part in the demonstration. A few thousand demonstrators, mostly women, had taken part in an authorised demonstration in Istanbul on Saturday to draw attention to women''s rights ahead of World Women''s Day on March 8. Police did not intervene.

City street. People on street. Girl mails letter. Man and woman in gym to demonstrate posture. Man pounds sticks into mat. Man in skeletal suit to demonstrate posture (odd movements). Man and woman in gym demonstrate form of posture. Man lays on table, does exercises. Woman does exercises on floor. Trainer demonstrates posture. Man demonstrates posture by leaning against wall. Man stretches in doorway. Man on table does stretching exercises. Shot of feet. Man makes ink print of feet on paper. Woman does toe curling exercises. Man and woman demonstrate posture. Teen girl comes to door and lets in date. Teen walks down street with ideal posture. People cross city street. People walk on city street. Man passes. Girl mails letter. Man with ruler and models demonstrate posture. Man jams stick into floor to demonstrate impact. Man with models shows human skeleton. Man in dark skeleton suit (looks like Halloween skeleton costume), demonstrates spine and posture. Shot of hips of man in tight pants hands show posture. Man lies on table, coach shows his posture. Man on table does sit-ups. Man on table stretches, does exercises. Man uses skeleton to show posture to models. Musclemen do exercises Man in dark skeleton suit demonstrates posture. Woman on floor does exercises. Stretching. Coach in mirror demonstrates slouch. Man leans against wall, does exercises. Stretching. Man leans in doorway, stretching. Man lays on table does stretching exercise. Coach uses skeleton to demonstrate posture to models. Foot with mark shows arch. Foot into ink pad, makes footprint. Shows arches of feet. Woman sits in chair does foot exercises with towel on floor. Woman stands next to plumb line, coach shows posture. Man stands in front of plumb line to show posture. Woman answers door, date arrives. Man walks confidently to office building.

Video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story about continued civil rights demonstrations at the Piccadilly Cafeteria in Dallas, Texas. Several demonstrators are scheduled to appear in court to answer contempt citations.

Clash of communist demonstrators and police in Tokyo turns into riot

1960s: Glass screen moved and camera repositioned for demonstration.

Violent anti-Soviet demonstrations and uprising in Prague, Czechoslovakia after Soviet occupation to end Prague Spring liberalization measures. Large crowds of anti-Soviet demonstrators on the street protest outside the Soviet Embassy. A Soviet flag on the building of Soviet Embassy. Demonstrators set fire to the communist Soviet flag. The flag burns. Demonstrators spread violence on the street. Police capture a demonstrator and take him away. Demonstrators set Soviet flag on fire on street. Location: Prague Czechoslovakia. Date: December 4, 1968.

Policemen versus protestors during demonstration

Needs Description