Get premium membership and access questions with answers, video lessons as well as revision papers.
-it contains blood vessels umbilical artery, iliac arteries and umbilical veins)
- it joins the placenta to the embryo
- passage for nutrients from the mother
- passage of excretory substances from foetus to mother for final discharge
- gaseous exchange
- passage of antibodies from mother to foetus, for protection of foetus against diseases
OR
1.Allow exchange of nutrients and oxygen from the placenta
2.Allow exchange of carbon dioxides and nitrogenous waste from the embryo to the placenta and into the blood stream of the mother
3. The blood of the mother does not come into contact with the blood of the embryo therefore there is no direct exchange of substances.
4. The placenta and umbilical cord allow selective exchange of substance such as
i)Blood cells
ii)Blood plasma
5. Other toxic substance in the mother blood cannot reach the blood of the developing baby
6.The embryo changes into a foetus after period of 4 weeks when most organs have developed.
7.The developing baby grows in the uterus in a uterine cavity filled with a liquid known as amniotic fluid .
johnmulu answered the question on October 2, 2017 at 09:55
- State the functions of placenta(Solved)
State the functions of placenta
Date posted: October 2, 2017. Answers (1)
- Outline Aspects of child growth and development(Solved)
Outline Aspects of child growth and development
Date posted: October 2, 2017. Answers (1)
- Difference between child growth and development(Solved)
Difference between child growth and development
Date posted: October 2, 2017. Answers (1)
- Discuss importances of record of work covered. (Solved)
Discuss importances of record of work covered.
Date posted: October 2, 2017. Answers (1)
- State Importances of lesson plan(Solved)
State Importances of lesson plan
Date posted: October 2, 2017. Answers (1)
- Identify six key components of schemes of work(Solved)
Identify six key components of schemes of work
Date posted: September 30, 2017. Answers (1)
- What is Scheme of work? (Solved)
What is Scheme of work?
Date posted: September 30, 2017. Answers (1)
- State the theories of personality(Solved)
State the theories of personality
Date posted: September 30, 2017. Answers (1)
- Define the term Planning?(Solved)
Define the term Planning?
Date posted: September 30, 2017. Answers (1)
- Discuss the roles of educational administrator (Solved)
Discuss the roles of educational administrator
Date posted: September 30, 2017. Answers (1)
- State functions of Educational managers?(Solved)
State functions of Educational managers?
Date posted: September 30, 2017. Answers (1)
- What is the function of a management committee of pre-primary institution?(Solved)
What is the function of a management committee of pre-primary institution?
Date posted: September 30, 2017. Answers (1)
- Explain Function of National Education board(Solved)
Explain Function of National Education board
Date posted: September 30, 2017. Answers (1)
- What is the composition of National Examination Board NEB?(Solved)
What is the composition of National Examination Board NEB?
Date posted: September 30, 2017. Answers (1)
- What are functions of National Examination Board NEB?(Solved)
What are functions of National Examination Board NEB?
Date posted: September 30, 2017. Answers (1)
- What are guiding principles of provision of basic education adopted by the Basic Education Act?(Solved)
What are guiding principles of provision of basic education adopted by the Basic Education Act?
Date posted: September 30, 2017. Answers (1)
- What is basic Education act of 2013?(Solved)
What is basic Education act of 2013?
Date posted: September 30, 2017. Answers (1)
- State three advantages of wireless communication.(Solved)
State three advantages of wireless communication.
Date posted: September 30, 2017. Answers (1)
- State three advantages of cashless society. (Solved)
State three advantages of cashless society.
Date posted: September 29, 2017. Answers (1)
- How has the education act of 2013 changed the curriculum in Kenya?(Solved)
Discuss how educational act 2013 has influenced curriculum change in Kenya
Date posted: September 28, 2017. Answers (1)