People are unable to focus on near objects. This occurs when the lens doesn't refract the light enough or the eyeball is too short. The image is broug...

Chemical messengers that travel in the blood to target organs.

A plastic cup that fits over the cervix (opening to the womb) to form a barrier.

Produce adrenaline which is used to prepare the body for fight or flight.

Glucose, water and ions.

Contact lenses, laser eye surgery and replacement lens surgery.

Outer transparent layer, bends/refracts light into the eye

A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature.

To only allow small soluble molecules (e.g. urea, water and ions) to move into the dialysis fluid, not large molecules like proteins.

Is a T shaped device that is inserted into the uterus to kill sperm and prevent implantation of the fertilised egg.

Made in the pituitary gland.Causes a egg to mature in one of the ovaries in a structure called a follicle.Stimulates the ovaries to produce oestrogen.

IVF leads to unused embryos which are destroyed or used for medical research. (Potential life).Genetic testing could be carried out on the embryo whic...