Science MCQs

Capillaries are thin-walled vessels where exchange of gases, nutrients, and wastes occurs.

The right atrium receives deoxygenated blood from the body via the superior and inferior vena cava.

Haemoglobin binds with oxygen in the lungs and carries it to body tissues.

Platelets release chemicals that help form clots to stop bleeding.

Plasma is the liquid component of blood, making up about 55% of its volume, and contains water, proteins, etc.

Hypertension (high blood pressure) can cause symptoms like sweating, increased heart rate, and discomfort.

The pericardium is a double-layered membrane that surrounds and protects the heart.

The pulmonary vein carries oxygenated blood from the lungs to the left atrium of the heart.

The trachea is commonly known as the windpipe.

Common cold is caused by a virus and affects the nasal passage and throat.