Identify the blood vessels at the tip of the black arrow.    

What type of tissue is found in the area labeled “A”

Which of these structures is called the pacemaker of the heart? Answer the question by writing down the letter on the picture corresponding to the question asked.                                                                

Identify the blood vessel indicated by the arrow labeled “A”.   

Name a specific cell that would be found in the histological area at the tip of the yellow arrow in the spleen.

Which event of the cardiac cycle is happening at “E”                                

Identify the structure indicated by arrow labeled “B”

Label “A” in the diagram below.  

Give the function of the histological structure bound by the yellow arrow.

Identify the blood vessel indicated by the arrow labeled “B”.