Human Circulatory System

Yes, all the options are correct.

No, the pulse cannot be felt here, but at the back of knee one can feel the pulse. Hence, this option is the correct answer.

All arteries except the pulmonary artery carry oxygenated blood. The pulmonary artery carries deoxygenated blood from heart to lungs. Conversely, most veins carry deoxygenated blood except pulmonary veins which carry oxygenated blood from lungs.

Blood capillaries are made of endothelium only.

Arteries have thick, muscular walls to withstand high pressure from heart pumping. Blood flows under high pressure. Veins are thin-walled with valves, carrying blood under diminished pressure back to heart.

These are the two large veins, which carry deoxygenated blood to the right atrium.

Squamous epithelium forms the outermost layer of skin, and lines the body's cavities and other parts. These include the heart, alveoli, the blood and lymph vessels and the oesophagus.

Yes, it is the correct answer. Statements a and d are incorrect. 

The increase in the supply of blood to skin by widening the blood vessels is called vasodilation. This results in greater loss of heat from body.

Aneurysm represents a blood-containing tumor connected directly with the lumen of an artery.

Tumor vasculature originates through the process of angiogenesis in which existing blood vessels are recruited and remodelled to provide increased hyper blood flow to avascular tumor tissues.

After birth, the ductus arteriosus (a fetal shunt between pulmonary artery and aorta) closes and becomes the ligamentum arteriosum, a fibrous connective tissue remnant. The fossa ovalis is the remnant of the foramen ovale (atrial septal defect).

Venae cavae are the two largest veins in the body that carry deoxygenated blood from various regions of the body to the right atrium of the heart. The superior vena cava located in the upper chest region is formed by the joining of the brachiocephalic veins and the inferior vena cava is formed by the joining of the common iliac veins, which meet a little below the small of the neck.

It is the largest artery in the body originating from the left ventricle of the heart and extending down to the abdomen, where it bifurcates into two smaller arteries. The aorta distributes oxygenated blood to all parts of the body through the systemic circulation. Damage to the aorta can threaten vital functions and can even cause death.

A venule is a very small blood vessel in the microcirculation that allows blood to return from the capillary beds to the larger blood vessels called veins. Venules are blood vessels that drain blood directly from the capillary beds. Many venules unite to form a vein.