Human Reproduction — BIOLOGY STD 12 Science — Question
Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction5 Marks
Question
Write a short note on uterus.
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Answer
Uterus (Womb):
It is a single, hollow, muscular, pear-shaped structure supported by ligaments and attached to the pelvic wall.
It is present between the urinary bladder and the rectum.
The lower part of the uterus is very narrow and is called cervix. The cavity of the cervix is called cervical canal, which forms the birth canal along with vagina.
The wall of the uterus has three layers of tissue:
Perimetrium: Outer, thin covering of the uterus wall.
Myometrium: Middle, thick layer of smooth muscle fibres which contracts strongly during delivery of the baby.
Endometrium: Inner layer, that contains glands and many blood vessels. It undergoes cyclical changes during the menstrual cycle.
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