Level 29 Level 31
63 words 0 ignored
Ready to learn Ready to review
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
No longer exists.
When organisms reproduce, they make more organisms like themselves.
The female sex cell (gamete).
When a type of organism is in danger of ceasing to exist.
When fertilisation happens outside the bodies of the parents.
Fusing of a male gamete with a female gamete.
Fertilised egg cell
What is produced when a sperm cell fuses with an egg cell.
When two things join together to become one.
A cell used for sexual reproduction.
When fertilisation happens inside the body of a parent.
The new organisms produced by reproduction.
Another word for a gamete.
Reproduction that needs two individuals to produce a new organism of the same type.
The male sex cell (gamete).
When something has special features that allow it to carry out its function.
Organ that stores urine.
Ring of muscle at the bottom of the uterus in females.
Small hairs on the surface of some cells.
Removal of the foreskin.
Another term for ‘oviduct’.
A covering of skin protecting the head of the penis.
Special tissues that make and release substances. The glands in the male reproductive system add a special liquid to the sperm cells to make semen.
When the ovaries in women stop releasing egg cells.
Female reproductive organ. Produces egg cells.
Carries egg cells from the ovaries to the uterus in females. Fertilisation happens here.
Time during which big physical changes happen in the body.
Organs used in sexual reproduction.
All the reproductive organs.
Bag of skin containing the testes in males.
Mixture of sperm and special fluids released by males during ejaculation.
Tube that carries sperm cells from the testes to the urethra.
Male reproductive organ. Produces sperm cells. Plural = testes.
Tube that carries sperm cells from the testes and urine from the bladder.
Organ in females in which a baby develops.
Tube in females leading from the cervix to the outside. The penis is placed here during sexual intercourse.
Bag containing amniotic fluid.
Liquid surrounding the growing embryo and protecting it.
When semen is pumped out of a man’s penis.
Tiny new human life that grows by cell division from a fertilised egg cell.
When the penis becomes stiff.
When an embryo sinks into the lining of the uterus.
Attached to the uterus wall, this takes oxygen and food out of the mother’s blood and puts waste materials into the mother’s blood.
When a female animal has an embryo growing inside her uterus.
Or ‘making love’, ‘having sex’, during which semen is ejaculated into the end of the vagina.
Carries food, oxygen and waste between the placenta and the growing embryo or fetus.
A procedure in which egg cells are taken from a woman and fertilised in a dish outside the woman’s body. The embryo develops and is then placed inside her.
The number of sperm cells in a certain volume of semen.
A human or animal in whose uterus an embryo grows but which is not an embryo made using one of her egg cells.
Baby born using IVF.
Substances produced by white blood cells that help to fight micro-organisms that might cause diseases.
The uterus muscles squeezing.
An embryo is known as a fetus once it has developed a full set of organs.
The length of time from fertilisation to birth.
Labour starts when contractions start in the uterus and ends when the afterbirth has come out.
Glands contained in the breasts of women that produce milk after childbirth.
Scar left by the cord. Often called the ‘belly button’.
An ultrasound scanner uses sound to create a picture of what is inside someone’s body.
Natural chemicals released in our bodies that control the menstrual cycle and puberty.
Spots on the skin.
Time when physical and emotional changes occur in teenagers.
Series of events lasting about a month, happening in the female reproductive system. The cycle causes ovulation and the lining of the uterus is replaced.
Releasing of an egg cell from an ovary.
The series of changes in an organism during its life.