Answer:
Contract
Explanation:
The main proteins involved in muscle contraction are called actin and myosin.
The answer is Epithelial tissue!
Here is the answer. The <span>epithelial tissues that secrete hormones and other substances used in metabolism are the glands. These glands belong to the endocrine system. Hope this answers your question. Have a great day ahead!</span>
For the answer to the question above, I think the answer is simply because <span>four legs characteristic is not special to mammals but the hair that is something more important and special characteristic of the mammals, that's why. I hope this helps
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It's around equal but girls.