Question
What is placenta? State its function in human female.

Answer

Placenta is a special umbilical cord develops in the fourth week which establishes an intimate connection between the foetal membrane and he uterine wall.
Function of Placenta:
The exchange of materials between the mother’s blood and the blood of foetus takes place through placenta. It serves as a nutritive, respiratory and excretory organ of the foetus.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

How do Mendel’s experiments show that traits are inherited independently?
Does geographical isolation of individuals of a species lead to formation of a new species? Provide a suitable explanation.
Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C.
Explain giving equation, what happens when:
a. $ZnCO _3$ is heated in the absence of air?
b. A mixture of $CU _2 O$ and $CU _2 S$ is heated?
What is the difference between displacement and double displacement reactions? aWrite equations for these reactions.
Calculate the power used in the $2Ω$ resistor in each of the following circuits:
  1. A 6V battery in series with $1Ω$ and $2Ω$ resistors.
  2. A 4V battery in parallel with $12Ω$ and $2Ω$ resistors.
The farmers have been cultivating a food plant X for over two thousand years and have produced as many as five entirely different looking vegetables A, B, C, D and E from it.
  1. What could the plant X be?
  2. What are A, B, C, D and E?
  3. What is the process of evolution involved in this example known as?
What is the action of water on (a) sodium (b) magnesium, and (c) aluminium? Write equations of the chemical reactions involved.
What is meant by the ‘angle of incidence’ and the ‘angle of refraction’ for a ray of light? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.
Explain how, new Bryophyllum plants can be produced from the leaves of the old plant ? Illustrate your answer with the help of a labelled diagram.