Human reproduction

Sex gland

Produces semen that contains sperm cells

Sperm duct

Sperm passes through

Testes

Produce sperm and testosterone- contained in scrotum

Penis

Passes urine and semen in and out of body

Urethra

Tube that carries semen or semen- a ring of muscle stops the two mixing

5 male reproductive structures

Sex gland

Sperm duct

Testis

Penis

Urethra

Ovary

Contains ova that develop when FSH is released

Oviduct/fallopian tube

Contains ovary to uterus

Uterus

Has thick lining so fertilised cells can be inplanted

Cervix

Ring of muscle at lower end or uterus to ensure foetus remains in place during pregnancy

Vagina

Muscular tube that leads into body

5 structures of female reproductive system

Ovary

Fallopian tube

Uterus

Cervix

Vagina

Menstrual cycle

Every 28 days lining of the uterus thickens and is prepared for pregnancy, if no fertilisation occurs lining is shed

What is the day of ovulation

Day 14

Oestrogen

Released by uterus

Causes thickening of uterus lining

Levels peak on day 10

Progesterone

Maintains uterus lining

Inhibits the release of LH and FSH

FSH & LH

FSA released by pituitary gland causes maturation of egg in ovary

LH stimulated the release of the mature egg

Decrease in oestrogen…

LH & FSH start increasing

Describe levels of hormones throughout menstrual cycle

Placenta

Allows glucose, oxygen and amino acids from mother’s blood to diffuse into developing foetus

Amniotic fluid

Liquid contained in a bag in the uterus that surrounds foetus and protects it