3.9

3.12 Amniotic Fluid

• Amniotic fluid is found inside the embryo.
• If anything happens to the outside uterus amniotic fluid prevent anything happening to the unborn child.
• Amniotic fluid can't be compressed, it absorbs pressure. 

3.11 placenta

• The placenta grows out of the developing embryo not the mother. 
• The blood vessels inside the placenta are the child's blood vessels including arteries and veins.
• The placenta grows into the wall of the uterus. 
• Glucose, amino acids and fats travels through the mother's blood stream and into the wall of the uterus. 
• Glucose, amino acids and fats will cross into the child's blood at the placenta.
• Amino acids, sugars and fats will go from the mother's to the child's blood.

3.24C

3.24B

3.24 A

3.16 DNA and Genetic information

• One chromosome contains thousands of genes
  
• There are 4 kinds of bases called: Adenine, Guanine, Cytosine and Thymine.

• They are found in DNA in the pairs: Thymine-Adenine and Guanine-Cytosine. 
• When you magnify one gene you can see a double helix which appear parallel.
• the order of bases is always the same (ATGC) this all constructs protein for the cytoplasm