HUESOS

How many bones are in an adult human body?

• 210

• 156

• 206

What is the longest bone in the human body?

• Clavicle

• Femur

• Tibia

How many valves are there in the human heart?

• 6

• 8

• 4

Where are red blood cells made?

• Blood vessels

• Bone marrow

• Heart

¿Estás disfrutando la lección en vídeo?

• Sí

• No

What is the lifespan of a red blood cell?

• 20 days

• 200 days

• 150 days

What is the length of the small intestine?

• 4 meters

• 10 meters

• 7 meters

How many bones are there in the human foot?

• 26

• 55

• 32

What is the most flexible muscle in the human body?

• Tongue

• Heart

• Tricep