Science Ch 6 adolescence

Adolescence

A natural phase of growth during which the body prepares for adulthood which is marked by rapid physical ,mental and emotional changes

Puberty

It is a biological process during which the body becomes capable of reproduction. In this stage the child’s body gradually begins to change into a adult body

Hormones

The chemical messengers released by glands that travel in blood to control body activities

Endocrine system

A system of ductless glands that release hormones directly into the bloodstream

Secondary sexual characteristics

Physical features that develop at puberty and distinguish males and females such as facial hair of breast developement

Ovulation

The release of a mature egg from an ovary

Menstruation

The monthly shedding of the uterine lining through the vagina when the fertilisation does not occur

Menarche

The first menstrual period of a girl

Menstrual cycle

The time from the first day of one period to the first day of another usually about 28 days

Testosterone

The male sex hormone that supports sperm production and male secondary sexual characteristics

Oestrogen

A female sex hormone that supports female secondary sexual characteristics and the menstrual cycle

Progesterone

A female sex hormone that prepares the uterus for pregnancy

Insulin

A hormone made by the pancreas that regulates blood sugar level

Adrenaline

A hormone made by adrenal glands that prepares the Body for emergencies( flight or fight response )