THE BRAIN Parietal lobe Frontal lobe Occipital lobe

THE BRAIN

Parietal lobe Frontal lobe Occipital lobe Temporal lobe ? ?

cerebrum pons brain stem medulla oblongata cerebellum

Medula oblongata pons cerebellum brain stem ? ? ? cerebrum

Medula oblongata cerebellum pons brain stem ? ? ? cerebrum

HUMAN REPRODUCTIVE SYSTEM

Ovary Vagina Uterus Urinary Bladder Fallopian tube Cervix Ovary ?

Ovary Vagina Uterus Urinary Bladder Fallopian tube Cervix ?

Ovary Vagina Uterus Urinary Bladder Fallopian tube Cervix Urinary Bladder ?

Ovary Vagina Fallopian tube ? Uterus Urinary Bladder Fallopian tube Cervix

Ovary Vagina Uterus Urinary Bladder Fallopian tube Cervix Vagina ?

Ovary Vagina Uterus Urinary Bladder Fallopian tube Cervix Uterus ?

Ovary Vagina Fallopian ? tube Uterus ? Uterus Fallopian tube Fallopian ? tube Ovary ? Vagina ? Cervix ? Cervix

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Vas deferens Seminal vesicle Vas deferens ? penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Urinary Bladder ? Vas deferens Seminal vesicle penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Prostate ? Vas deferens Seminal vesicle penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum penis ? Vas deferens Seminal vesicle penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Vas deferens Seminal vesicle Epididymus ? penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Vas deferens ? Seminal vesicle Scrotum penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Vas deferens Seminal vesicle penis Prostate Seminal ? vesicle

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Vas deferens ? Testes Seminal vesicle penis Prostate

Epididymus Urinary Bladder Testes REPRODUCTIVE SYSTEM Urethra MALE Scrotum Urethra ? Vas deferens Seminal vesicle penis Prostate

FUNCTIONS: Seminal vesicle Testes – – Testes produces sperm(male gamete) Epididymus – Epididymus where the sperm mature develop flagella and are stored Vas deferens – Vas deferens transports the sperm Prostate Vas deferens ? ? Epididymus ? Testes Scrotum ? Scrotum – regulates the temperature Scrotum of the testes for proper development of sperm Seminal vesicle (gland) – secretes fluid that nourishes sperm Prostate gland – secretes fluid(component of semen)

Where does fertilization occur?

Where does embryo implant and develop?

What is occurring here? implantation

egg + sp erm What is occurring here? fertilization

Where does the fetus develop? uterus

What nourishes the embryo during development? umbilical cord placenta

placenta Wastes & CO 2 Nutrients & oxygen embryo mother Placenta – structure through which nutrients and oxygen pass to embryo

What is the function of amniotic sac? • serves to cushion the unborn baby from jolts and bumps. • allows the baby to move freely and exercise growing muscles. • maintains a constant temperature for the baby.

The First Trimester: 0 – 12 weeks • Fetus is fully formed – arms, legs, fingers, toes. • Organs are fully formed but do not function (except heart) • Reproductive organs form but not distinguishable on ultrasound

The Second Trimester: 13 – 26 weeks • • • Organs mature and begin to function Bone replaces cartilage Hair grows on skin Sex becomes evident Fetus increases in length

The Third Trimester: 27 – 40 weeks • Organs fully mature • Fetus grows in length and mass