They do not have external ears like us. but they do have ear holes located directly behind their eyes. frogs ear holes are covered with thin tympanic membranes or the eardrums that protect the inner ear cavity.
        
             
        
        
        
A shell is considered as biotic (living) because it is a hard, rigid covering of many animals such as snail, sepia, pila, turtles, sea urchins. A shell is protective outer layer of these soft bodied animals.
 
        
                    
             
        
        
        
Answer:
heart blood vessels and blood 
 
        
                    
             
        
        
        
<h2>False  </h2>
Explanation:
Alimentary canal components include mouth, pharynx, esophagus, stomach, small intestine and large intestine whereas liver is a component of the accessory digestive system 
- The liver is a large organ that is located in the upper right portion of abdomen, beneath the diaphragm 
- The liver has two large sections, called the right and the left lobes and the gallbladder sits under the liver, along with parts of the pancreas and intestines
- The liver and these organs work together to digest, absorb, and process food
- The liver's main role is to filter the blood coming from the digestive tract, before passing it to the rest of the body
- The liver also detoxifies chemicals and metabolizes drugs
- The liver secretes bile that ends up back in the intestines and also makes proteins important for blood clotting and other functions
 
        
        
        
Answer:
no comprando amigo
Explanation: soy ingles amigo