HISTOLOGY OF CARDIOVASCULAR SYSTEM

You are provided with Exhibit A, a light micrograph showing vessels and other structure.

Name the structure outline with blue circle.

• Artery

• Vein

• Nerve

Name structure outline with green circle.

• Vein

• Artery

• Nerve

Name structure outline with red circle.

• Nerve

• Vein

• Artery

Which of the following statement is TRUE regarding histology of heart muscle?

• It has multi nuclei.

• Its nucleus lies at the peripheral.

• Present of purkinje fibers in the atrium

• Epicardium is lined with mesothelium

Regarding purkinje fiber which statement is TRUE

• The fibers lie in the epicardium.

• The fiber has lower density of myofibrils.

• It does not contain intercalated disk.

• It is similar with cardiac muscle.

You are provided with Exhibit B, a light micrograph showing bundle of fibers.

Name the fiber. State a reason/characteristic that you may see from this micrograph.

• Cardiac muscle fiber

• Purkinje fibers

• Skeletal muscle fiber

• Smooth muscle fiber

You are provided with EXHIBIT C, a light micrograph showing the cross section of muscle.

Name the structure outline with yellow circle.

• Purkinje fibers

• Cardiac muscle fibers

• Skeletal muscle fibers

• Smooth muscle fibers

Which intercalated disk /interdigitating junction allows electrical continuity?

• Desmosomes

• Fascia adherens

• Gap junctions

• Macula adherens

Which intercalated disk/interdigitating junction has keratin?

• desmosomes

• fascia adherens

• gap junction

Give a reason why cardiac nucleus located centrally and not peripherally

• less myofibril

• more myofibril

• more glycogen

• less glycogen