Right atria

Left atria

Inferior vena cava

Tricuspid valve

Right atria

Pulmonary vein

Left ventricle

Superior vena cava

Mitral valve

Aorta

Left ventricle

Pulmonary artery

11

7

10

4

Pulmonary vein

Superior vena cava

Left ventricle

Pulmonary artery

3

9

8

12

Tricuspid valve

Right ventricle

Right atria

Left ventricle

Red blood cells, stem cells and platelets

Erythrocytes, stem cells and thrombocytes

Red blood cells, leukocytes and thrombocytes

Erythrocytes, white blood cells and neuroglial cells

Arteries, capillaries and ventricles

Veins, arteries and capillaries

Capillaries, valves and arteries

Are the smallest blood vessels

They have walls only one cell thick

they connect arteries and veins

All of them are correct