Lung Development Timing: Embryonic Origin
The development of the lungs begins early in embryonic life.
The respiratory system, including the lungs, originates from the primitive foregut, which is the early part of the digestive tract.
A specific outpouching from the ventral wall of the foregut marks the beginning of lung formation.
This critical event, the formation of the lung bud, occurs during the 4th week of intrauterine development.
Therefore, the lungs are derived from a primitive foregut outpouching during the 4th week of intrauterine life.
Important Questions from Developmental Disorders
Which of the following are correct regarding androgen insensitivity syndrome?
1. Inherited as X-linked recessive disorder
2. Karyotype is 46 XXY
3. It is also called testicular feminization
4. Confirmation of diagnosis by gonadal biopsy
Select the answer using the code given below.
- A 16-year-old girl with primary amenorrhoea presents to the gynaecology OPD for evaluation. She has normal secondary sexual characters. Her karyotype is 46,XX and ultrasound reveals normal ovaries and tubes but absent uterus. What is her clinical diagnosis?
- The Gartner's duct cyst is usually located in
- Which one of the following statements is NOT correct regarding Gastroschisis?
- A 16 year old girl presents with primary amenorrhea with absent vagina, cervix and uterus in the presence of normal secondary sexual characteristics. Ovaries are present on USG. The most probable diagnosis is:
