The heart is part of the cardiovascular system and is made of cardiac muscle. cardiac muscle has special characteristics that distinguish it from other types of muscle tissue. which of the following are characteristics of cardiac muscle

a) one nucleus

c) striated

g) involuntary

h)  intercalated discs

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]