Definition

A threadlike structure in muscle cells that helps them contract and is made of proteins called myosin and actin.

Example

The myofibril is essential for muscle contraction and movement.

Conversation

Have you ever heard of a myofibril?

Yeah, isn't it related to muscle fibers?

Exactly! They play a key role in how muscles contract.

That's pretty cool; I didn't know they were so important.

Synonyms & Antonyms

Root Explanation

Myofibril is formed from "myo-" (from Greek "musculus", meaning muscle) and "fibril" (from Latin "fibrilla", meaning a small fiber). The word refers to a small fiber that is part of muscle tissue, specifically the contractile elements within muscle cells.

Memory Tip

Think of 'myo-' relating to 'muscle' and 'fibril' meaning 'small fiber' — together, they help you remember that a myofibril is a small fiber found in muscle.

Visually Confused Words