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Which of the following helps a developing embryo to expel waste products in case of humans?
Placenta
Cervix
Oviduct
Ovary
Placenta
The placenta is a specialized organ that develops during pregnancy, acting as a bridge between the fetus and the mother. It facilitates the exchange of oxygen and nutrients from the mother to the fetus, while simultaneously allowing the diffusion of metabolic waste products, such as carbon dioxide and urea, from the fetal blood into the maternal blood for excretion.
The placenta is a specialized organ that develops during pregnancy, acting as a bridge between the fetus and the mother. It facilitates the exchange of oxygen and nutrients from the mother to the fetus, while simultaneously allowing the diffusion of metabolic waste products, such as carbon dioxide and urea, from the fetal blood into the maternal blood for excretion.
The biological study of the placenta falls under the broader field of Embryology, and the physiological process of nutrient/waste exchange is a fundamental component of the reproductive system as discussed in NCERT Biology curricula.
The placenta serves as a semi-permeable barrier for material exchange.
Waste removal occurs via passive diffusion across the placental membrane.
It also acts as an endocrine gland, secreting hormones like hCG and progesterone to maintain pregnancy.
The placenta is formed from both maternal (decidua basalis) and fetal (chorion frondosum) tissues.
Option B (Cervix) is the lower part of the uterus that dilates during childbirth.
Option C (Oviduct) is the site of fertilization, not fetal development.
Option D (Ovary) is responsible for egg production and hormone secretion (estrogen/progesterone).
A is correct тАФ The placenta facilitates the removal of metabolic waste from the fetal circulatory system to the maternal blood.
When studying reproductive health, correlate placental function with the 'Endocrine System' topic, as the placenta temporarily replaces the function of the corpus luteum in hormone regulation.
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