21. The strongest muscle in the human body is _____.
Correct Answer: Masseter (jaw)
The masseter (jaw muscle) is the strongest based on force, capable of exerting up to 200 pounds of pressure on the molars.
22. The longest muscle in the human body is ____.
Correct Answer: Sartorius
The sartorius muscle is the longest muscle, stretching from the hip to the knee, important in leg flexion and rotation.
23. Which element is present in the largest amount in the human body?
Correct Answer: Oxygen
Oxygen makes up about 65% of body mass, mostly due to water and organic molecules.
24. The percentage of water in the human body is ____.
Correct Answer: 60–70%
The human body is about 60–70% water, essential for metabolism, circulation, and temperature regulation.
25. How many pairs of spinal nerves are in the human body?
Correct Answer: 31
There are 31 pairs of spinal nerves, responsible for transmitting signals between the spinal cord and body.
26. The volume of blood in a human body is ____.
Correct Answer: 5–6 litres
The average adult human has about 5–6 litres of blood, varying with body size and sex.
27. The most common blood type in humans is ____.
Correct Answer: O+ and A+
Globally, O+ is the most common blood type, followed by A+. Both together make up the majority of blood groups.
28. The least common blood type in humans is ____.
Correct Answer: AB-
AB- is the rarest blood type in humans, present in less than 1% of the global population.
29. The largest part of the brain is called ____.
Correct Answer: Cerebrum
The cerebrum is the largest brain part, responsible for higher brain functions like thought, memory, and voluntary actions.
30. Which gland is a dual gland (both endocrine and exocrine)?
Correct Answer: Pancreas
The pancreas functions as a dual gland: it secretes digestive enzymes (exocrine) and hormones like insulin (endocrine).
31. The largest cell by volume in the human body is _____.
Correct Answer: Ovum
The ovum (female egg cell) is the largest human cell by volume, visible to the naked eye (~0.1 mm in diameter).
32. The longest cell in the human body is _____.
Correct Answer: Nerve cell
Nerve cells (neurons) can be over a meter long, especially motor neurons extending from the spinal cord to toes.
33. The gestation period in humans is ____.
Correct Answer: 267 days
The average human gestation period is about 267 days (≈38 weeks), though pregnancies are often measured as 280 days from the last menstrual period.
34. The largest artery in the human body is known as _____.
Correct Answer: Aorta
The aorta is the largest artery, carrying oxygen-rich blood from the heart to the body.
35. The largest vein in the human body is _____.
Correct Answer: Inferior vena cava
The inferior vena cava is the largest vein, carrying deoxygenated blood from the lower body to the heart.
36. The longest muscle in the human body ____.
Correct Answer: Sartorius
The sartorius is the longest muscle, running diagonally across the thigh, aiding in hip and knee movements.
37. The largest gland in the human body is ____.
Correct Answer: Liver
The liver is the largest gland, vital for detoxification, metabolism, and bile production.
38. The mass of the human brain is ____.
Correct Answer: 1.4 kg
The human brain weighs about 1.4 kg on average, though it varies slightly by age, sex, and body size.
39. The mass of the human liver is _____.
Correct Answer: 1.4–1.8 kg
The liver usually weighs 1.4–1.8 kg, making it the largest internal organ and gland in the human body.
40. The mass of the human heart is ____.
Correct Answer: 340 g (men), 250 g (women)
The human heart weighs about 340 g in men and 250 g in women, with slight variations due to body size and health.
41. _____ kidney is lower in the human body.
Correct Answer: Right kidney
The right kidney lies slightly lower than the left, due to the space occupied by the liver.
42. Which lung is larger in the human body?
Correct Answer: Right lung, 3 lobes
The right lung is larger with 3 lobes, while the left lung has only 2 lobes to make room for the heart.
43. How many joints are there in the human body?
Correct Answer: 230
The human body has about 230 joints, including movable, slightly movable, and immovable types.
44. The length of the small intestine in humans is _____.
Correct Answer: 25 feet (7.62 m)
The human small intestine is about 25 feet (7.62 m) long, responsible for nutrient absorption.
45. The pH of human blood is ____.
Correct Answer: 7.3–7.4
Normal blood pH is tightly regulated between 7.3 and 7.4, slightly alkaline.
General Science questions are an essential part of every competitive examination. Among them, facts about the Human Body have frequently appeared in previous tests conducted by various institutions. General Science remains an inevitable area where a candidate’s general knowledge is thoroughly assessed. Hence, it becomes vital for aspirants to be well-versed in important facts about the Human Body. With this in mind, we have carefully prepared a comprehensive set of MCQs on this topic, enabling candidates to practice effectively for questions that are likely to appear in upcoming examinations, as they have consistently featured in many past exams.