Help with Identifying some of the heart.

View the anatomical models Figure 30.2 (a), (b), (c), and Figure 31.1 from your Laboratory Manual and identify the structures that are described by the following statements.

a.   Superior heart chambers; atria
b.   Pumps the heart; ventricles
c.   Provides nutrient blood to the L ventricle heart muscle; Left Coronary Artery
d.   Drains blood into the R atrium; Coronary Sinus
e.   Delivers oxygenated blood from lungs to L atrium; Pulmonary Veins
f.   AV valve between R atrium and R ventricle; Pulmonary Trunks
g.   Divides the heart longitudinally into R and L sides
h.   Carries oxygenated blood to all arteries
i.   Pacemaker
j.   Dense network of conductive cells throughout the ventricles

I need help with some of the questions. I did answer some of the questions in bold. If my answers are wrong could you please help! Also, I have attached the pictures. Thanks!