The extraembryonic membrane that contains fluid to cushion and protect the embryo is the Blank______.Multiple choice question.yolk sacallantoisamnionchorion

Step 1: Identify the Options

The options provided are:

1. Yolk sac
2. Allantois
3. Amnion
4. Chorion

Step 2: Relevant Concepts

• The extraembryonic membranes are critical in the development of an embryo, serving various functions like providing nutrients, gas exchange, and protection.

Step 3: Analyze Each Option

1. Yolk sac: This membrane primarily provides nutrients to the early embryo and is involved in hematopoiesis (formation of blood cells).
2. Allantois: It assists in waste management and gas exchange but is not primarily for cushioning.
3. Amnion: This membrane contains amniotic fluid, which cushions and protects the embryo from physical shocks.
4. Chorion: This membrane is important for nutrient transfer and development of the placenta in mammals.

Step 4: Verify and Summarize

The amnion is specifically known for surrounding the embryo and containing the amniotic fluid, which serves as a protective cushioned environment. Thus, the correct answer is the Amnion.

Final Answer

The extraembryonic membrane that contains fluid to cushion and protect the embryo is the Amnion.