Reproduction

**Reproduction**
__Egg__: female sex cell __Sperm__:male sex cell __Fertilization__: joining of sperm and egg Sexual reproduction involves the production of eggs by the famale and sperm by the male. __Zygote__: Result of fertilization (46 chromosomes in humans) __Chromosomes__: each sex cell from male and female has 23 chromosomes and when they join, it gives a total of 46 chromosomes. Each chromosome contains basic information for the cell to function.

**Male Reproductive System**
- function: to produce sperm and testosterone Testes: organ which produces sperm and testosterone (hormone that controls the development of secondary sexual characteristics, like body hair, muscle growth, and everything else that happens during puberty) Scrotum: external pouch which stores the testes Semen: mixture of sperm and other fluids containing nutrients Urethra: passage for semen and urine Penis: male organ used during sexual reproduction
 * Parts:**

additonal information: sperm being produced starts when you are a teenager. Semen leaves the body by urethra/penis

- funtions: to produce eggs and host a baby throughout the whole pregnancy. It also produces estrogen (helps develop the female secondary sexual characteristics like wide hips, larger breasts)

Ovary: produces egg every month/produces estrogen Fallopian Tube: passage from ovary to uterus Uterus: where baby grows if it's fertilized (the lining of the uterus is released along with the unfertilized egg) Cervix: entrance of uterus Vagina: birth canal
 * Parts:**

the main events are: first half of the cycle: egg develops and uterus is prepared for an embryo (the lining/wall thickens). middle of the cycle: ovulation = the process when the egg is released from the ovaries second half of the cycle: If there is fertilization = zygote moves to uterus where it grows for 9 months If there is no fertilization: hormone levels change and the unfertilized egg + lining of the uterus get ready to be released during menstruation (starting the cycle all over again)
 * Menstrual Cycle:** a cycle which takes about 28 days

Emyr and Steven