Mention if the following statements are True (T) or False (F):

(i) Placenta produces certain hormones.

(ii) Amniotic fluid serves to provide oxygen to the foetus.

(iii) Heart and blood vessels have been formed by the end of five weeks of pregnancy.

(iv) Mother's blood flows into the foetus through placenta.

Complete the following by filling in the blanks 1 to 5 with appropriate words:

The human female gonads are ovaries. A maturing egg in the ovary is present in a sac of cells called ……………(1). As the egg grows larger, the follicle enlarges and gets filled with a fluid and is now called the …………… (2) follicle. The process of releasing the egg from the ovary is called …………… (3). The ovum is picked up by the oviductal funnel and fertilization takes place in the ……………(4). In about a week the blastocyst gets fixed in the endometrium of the uterus and this process is called ……………(5).

The onset of menstruation in women is called ;

1. Parturition
2. Menopause
3. Ovulation
4. Menarche

In the human menstrual cycle, the ovulation occurs around :

1. 7 days
2. 21 days
3. 28 days
4. 14 days