pregnancy + placenta

Question 1

role of the placenta:

Answer 1

allows exchange of materials

Question 2

material which the embryo needs:

Answer 2

oxygen, glucose, amino acids, antibodies, ions/salts, water, vitamins

Question 3

waste material from the embryo:

Answer 3

urea, carbon dioxide

Question 4

how is the placenta adapted for faster diffusion?

Answer 4

• large surface area
• good blood supply (increase concentration gradient)
• thin- short diffusion distance
• villi

Question 5

role of the amniotic fluid:

Answer 5

protects the foetus from jolts and bumps