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प्रश्न
Give reason.
Placenta is extremely essential for foetal development.
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उत्तर
The placenta helps the growing embryo acquire nutrients from the mother's blood. The placenta has villi on the embryo's side of the tissues and blood spaces on the mother's side. These villi have a vast surface area, which aids in the transport of nourishment and oxygen from the mother to the foetus through blood. Waste substances created by the embryo are eliminated into the mother's blood via the placenta. Therefore, Placenta is extremely essential for foetal development.
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संबंधित प्रश्न
Sketch the labelled diagram.
Human female reproductive system.
Give appropriate term of the following:
The process of fusion of ovum and sperm.
Complete the following statement by choosing the correct alternative:
Menstrual flow is a character is the feature of ______.
Given here is a section of the female reproductive system of human beings.
Name the part where fertilisation occurs in human beings.
Which of the following is ectodermal in origin?
| (i) | Heart |
| (ii) | Sweat glands |
| (iii) | Adrenal medulla |
| (iv) | Middle ear |
| (v) | Urinary bladder |
| (vi) | Dermis of skin |
Which of the following is correct about mammalian testes?
The external genitalia of the human female is called ______.
Female reproductive organs and associated functions are given below in column A and B. Fill the blank boxes.
| Column A | Column B |
| Ovaries | Ovulation |
| Oviduct | a |
| b | Pregnancy |
| Vagina | Birth |
In absence of fertilization, corpus luteum degenerates into ______.
Which uterine layer undergoes cyclical changes during the menstrual cycle and is the site of implantation?
