Q 01/05

What is the largest organ of the human body?

A) Liver

B) Brain

C) Skin

D) Lungs

Answer · why

C) Skin

The skin is the body's largest organ, forming a protective barrier against the external environment, regulating temperature, and receiving sensory inf...

Q 02/05

How many bones are typically found in an adult human skeleton?

A) 270

B) 180

C) 206

D) 230

Answer · why

C) 206

While babies are born with approximately 270 bones, some fuse together during growth, resulting in 206 bones in an adult skeleton.

Q 03/05

Which of these is the smallest bone in the human body?

A) Incus

B) Malleus

C) Stapes

D) Phalange

Answer · why

C) Stapes

Located in the middle ear, the stapes, also known as the stirrup bone, is the smallest bone in the human body.

Q 04/05

How many chambers does the human heart typically have?

A) Two

B) Three

C) Four

D) Five

Answer · why

C) Four

The human heart has four chambers: two atria (upper chambers) and two ventricles (lower chambers), which work together to pump blood throughout the bo...

Q 05/05

Which blood type is considered the universal donor for red blood cells?

A) A-positive

B) AB-negative

C) O-negative

D) B-positive

Answer · why

C) O-negative

O-negative blood is considered the universal donor because it lacks A, B, and Rh antigens, meaning it can be transfused to people with any blood type ...