Q 01/05

Which bone is the longest in the human body?

A) Radius

B) Tibia

C) Humerus

D) Femur

Answer · why

D) Femur

The femur, or thigh bone, is the longest and strongest bone in the body; it is so sturdy that in a healthy adult it usually takes a car crash or simil...

Q 02/05

Which organ is both the heaviest internal organ and the largest gland in the human body?

A) Pancreas

B) Liver

C) Brain

D) Stomach

Answer · why

B) Liver

The liver weighs about 1.5 kg and can regrow lost tissue, which is why a living donor can give away part of theirs: both portions grow back to normal ...

Q 03/05

Which bone is the largest sesamoid bone in the human body, meaning it sits embedded within a tendon?

A) Talus

B) Patella

C) Pisiform

D) Calcaneus

Answer · why

B) Patella

The patella, or kneecap, grows inside a tendon and works like a pulley: by holding the tendon away from the joint it adds leverage, so the knee straig...

Q 04/05

What is the primary function of red blood cells in the human body?

A) Clot blood

B) Fight infection

C) Transport oxygen

D) Regulate body temperature

Answer · why

C) Transport oxygen

Transport oxygen is the job: red cells are packed with iron-rich haemoglobin that binds oxygen in the lungs and releases it as the cells squeeze throu...

Q 05/05

What is the outermost layer of the human skin called?

A) Fascia

B) Dermis

C) Hypodermis

D) Epidermis

Answer · why

D) Epidermis

The epidermis has no blood vessels of its own, and its surface is a layer of dead, flattened cells that flake away constantly and are replaced from be...