Question

Which option is a main type of muscle tissue?
Cardiac
Skin
Spongy bone
Blood vessels

Answer 1

The main type of muscle tissue among the options you provided is **Cardiac** muscle.

To clarify:
- **Cardiac muscle** is one of the three main types of muscle tissue (the others being skeletal and smooth muscle) and is found in the heart.
- **Skin** is an organ consisting of multiple tissue types, including epithelial and connective tissues.
- **Spongy bone** is a type of connective tissue.
- **Blood vessels** are structures made up of various types of tissues, including smooth muscle tissue, but are not a type of muscle tissue themselves.

So, the correct answer is **Cardiac**.