In a mammal, the placenta performs functions similar to those to the

Truss

1 year ago

Option D (intestine, heart, and digestive system) is incorrect because the heart is not one of the primary organs that the placenta directly replaces.

Here’s why:

Intestine & Digestive System: The placenta does absorb and transfer nutrients like the digestive system, so this part is partially correct.

Heart: The heart pumps blood, but the placenta does not perform this function. Instead, the fetus has its own heart, which circulates blood through the placenta for gas and nutrient exchange.


On the other hand, option A (lungs, kidneys, and digestive system) is correct because the placenta replaces the function of the lungs (gas exchange), kidneys (waste removal), and digestive system (nutrient absorption) before birth.

Let me know if you need further clarification!

samuel8816

3 years ago

💯

aliyah24434

2 months ago

The correct answer is:
A. lungs, kidneys and digestive system
🧠 Explanation:
In mammals, the placenta acts as a life-support system for the fetus. It performs functions similar to:
Lungs → exchanges gases
(oxygen enters the fetus, carbon dioxide is removed)
Kidneys → removes waste products
(like urea from the fetus into the mother’s blood)
Digestive system → supplies nutrients
(glucose, amino acids, etc., from the mother to the fetus)
Summary:
Placenta = respiration + excretion + nutrition
That’s why Option A is correct