Definition

A type of fetal membrane that is formed by the combination of two layers, the chorion and allantois, which is important for the development of embryos in reptiles, birds, and some mammals.

Example

The chorioallantois plays a crucial role in nutrient exchange during the development of the embryo.

Conversation

Have you ever heard of the term chorioallantois?

No, I haven't. What does it mean?

It's a fetal membrane that plays a big role in the development of some animals.

That’s really interesting! I love learning about biology.

Synonyms & Antonyms

Root Explanation

Chorioallantois is formed from "chorion" (from Greek "chōrion", meaning membrane) and "allantois" (from Greek "allantois", meaning sausage or a pouch). The word refers to a specific membrane structure in the embryos of reptiles and birds that combines the chorion and allantois for respiration and waste removal.

Memory Tip

Think of 'chorion' as a protective 'membrane' and 'allantois' as a 'pouch' for waste — together, they form a crucial structure for embryo development.

Visually Confused Words