The Human Skeleton Y8 B

Question 1

How many bones does the human skeleton have? 🦴

Answer 1

206 bones, but some fuse together later in life

Question 2

What are the 4 main functions of the human body?

Answer 2

It supports the body enabling it to stand upright, it protects vital organs, it enables movement by allowing muscles to connect the bones and pull them up, it creates red blood cells to carry oxygen and white blood cells to fight disease and platelets to help blood clot.

Question 3

What are bones made of?

Answer 3

Bones are made of a combination of a hard calcium compound, which is very hard, and a protein called collagen which gives the bones a little bit of flex

Question 4

Where does a joint exist?

Answer 4

Where 2 or more bones meet

Question 5

What do joint enable us to do?

Answer 5

They enable the skeleton to move and limbs to bend

Question 6

What are the types of joints

Answer 6

Ball and socket joint, hinge joint, pivot joint, fixed joints

Question 7

Name a fixed joint

Answer 7

Skull

Question 8

Name a ball and socket joint

Answer 8

Shoulder

Question 9

Name a pivot joint

Answer 9

Neck

Question 10

Name a hinge joint

Answer 10

Elbow

Question 11

What attaches bone to bone?

Answer 11

Ligaments (which also stabilise joints)

Question 12

Why do ligaments have to stretch?

Answer 12

So joints can bend without snapping

Question 13

What attaches muscle to bone?

Answer 13

Tendons

Question 14

What happens when the muscle contracts?

Answer 14

The bone is pulled towards it

Question 15

Do tendons stretch?

Answer 15

No, so that the movement is immediate and all the force is transmitted to move the bone.

Question 16

Why do we need ligaments?

Answer 16

They hold bones together, and without them, bones could move out of place

Question 17

Why do we need tendons?

Answer 17

They attach muscle to bone, with allows movement.

Question 18

Why do we need cartilage?

Answer 18

It prevents bones from rubbing together, which is very painful. Over time the cartilage can wear down, which is called arthritis.

Question 19

What are muscles mostly made of?

Answer 19

Muscle cells

Question 20

What is special about muscle cells?

Answer 20

They can expand and contract

Question 21

Does exercise increase the amount of muscle cells you have ?

Answer 21

No, but it increases the size and strength of each individual cell

Question 22

What happens when a muscle contracts?

Answer 22

It shortens, with creates a pull on bone

Question 23

What is the name for a pair of muscles ? (One muscle witch pulls a bone, one with pulls it back)

Answer 23

An antagonist pair