3.19b

3.19a

3.18b

3.18a

3.12

the embryo is surrounded by the amniotic fluid

one of the functions of this fluid is that it can protect the developed the embryo.

It cannot by compressed and when we squeeze the fluid it absorbs the pressure therefore protecting the unborn child

(like kicking your leg in a swimming pool) 

3.11

Unborn child is in amniotic fluids within the uterus. It cannot digest, breathe or excrete.

So growing out of the embryo there is a placenta attached to the child by the umbilical cord.

The placenta grows out of the embryo not the mothers. The blood vessels are the child’s not the mothers.

The placenta grows into the wall of the uterus

When the woman eats through pregnancy (glucose, amino acids and fats) these vital nutrients will pass through the woman’s blood to the child’s blood through the placenta

The placenta has a large surface area and is very thin.

The child also produces carbon dioxide and urea which will pass onto the mother to excrete. 

3.9a

Functions of the male reproductive system:

Bladder: stores urine

Testis: carries out meiosis which produces gametes -> sperm

Epidermis: stores sperm cells

Vas deferens : carries sperm to penis during sexual stimulation

Prostate: 20/30 % semen sugar/alkali

Seminal vescels – semen 70%

Urethra : semen down the penis  also exit for urine

Penis: carry semen into the vagina during sexual intercourse

3.9a

Functions of the male reproductive system:

Bladder: stores urine

Testis: carries out meiosis which produces gametes -> sperm

Epidermis: stores sperm cells

Vas deferens : carries sperm to penis during sexual stimulation

Prostate: 20/30 % semen sugar/alkali

Seminal vescels – semen 70%

Urethra : semen down the penis  also exit for urine

Penis: carry semen into the vagina during sexual intercourse