Reproduction. Topics in Reproduction. (Review) : Reproductive organs. What does what? Fertilisation : The science The female menstrual cycle Birth control in males and females: the pros and cons The placenta Breastfeeding . Questions….For us to discuss on Monday….
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Check the links on the Blog to review anatomy and function!
Seen in Hydra and other species…
Links to explain…
The egg is the largest cell, while the sperm is the smallest in the human body
According to wikipedia…
Male Condom –
The male condom is the only method of contraception boys can use. It's really just a rubber tube. It's closed at one end like the finger of a glove so that when a boy puts it over his penis it stops the sperm going inside a girl's body
The female condom is a fairly new barrier method. It is not as widely available as the male condom and it is more expensive
‘The IUD’ – which stands for ‘intra-uterine device.’
Most IUDs are T-shaped. They’re made of plastic and copper, sometimes with a little silver inside.
They prevent your partner’s sperms from getting through your womb and into your tubes
Diaphragms and caps fit inside the vagina and cover the cervix (entrance to the womb). They are barrier methods of contraception and stop sperm meeting an egg.
come in several different forms: cream, gel and foam. Most spermicides contain nonoxynol-9, a chemical that kills sperm.
Spermicides can be used alone but are more effective when used with another method of birth control, such as a condom or diaphragm.
Contraceptive Implant - The contraceptive implant is a small, flexible tube that's inserted under the skin in the upper arm. It slowly releases a hormone called progestogen and works for three years.
The contraceptive injection contains a hormone called progestogen and is a long-term method of contraception.
It's injected into a muscle and the hormone is released very slowly into the body.
What does the placenta remove from the baby?
A microscope photograph of a cross-section of one of the smallest branches (called a villus) of a tree-like placental cotyledon at term. Mother’s red blood cells surround the villus, while the baby’s red blood cells are inside large capillaries within the villus. The blood of the mother and the blood of the baby are everywhere separated by the syncytial trophoblast, which is a seamless layer comprising a single cell.