Answer:
pericardium is outer covering layer of heart. pericardium is double layered membrane.
Explanation:
 
        
                    
             
        
        
        
Answer: Proteins are broken down into amino acids by protease enzymes.
Explanation:
Protein is an essential nutrients which is needed for growth and development. Protein is the major constituent of hormones, enzymes, eyes, muscles e.t.c.
The protein sources are eggs,beans,meats, milk e.t.c.
Protein digestion start in the stomach. Once protein consume get to the intestine, hydrochloric acid and protease enzymes breakdown protein into amino acids.The Amino acids are linked together by peptides bond. The perform this by cleaving to the peptides bond within the protein by a process called hydrolysis.
 
        
             
        
        
        
They communicate with smells, sounds, visual messages, and touching.
<h3>Vocal Communication in Primates:</h3>
Animals frequently communicate through voice. In order to trace the evolutionary roots of our sophisticated communication system, researchers frequently study vocal communication in nonhuman primates (primates) with the goal of detecting similarities and differences between human language and speech. Listeners appear to comprehend the meaning of the sounds made by primates in response to particular occurrences, such as the discovery of a particular predator. Although this form of communication and human referential words appear to be similar on the surface, the mental processes that underpin them may be extremely different.
There is far more disagreement regarding whether the production of ape vocalizations and language share any similarities, despite the fact that generally speaking, the flexibility displayed by primate receivers may exhibit some similarities with humans. It is generally acknowledged that primates, unlike humans, cannot produce novel vocalizations.
Learn more about communication here:
brainly.com/question/17285920
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