Exercise for a Healthy Body (Ch 6)

Label the different types of joints.

a

b

c

hinge

ball-and-socket

pivot

Using the chart, help Bob label bones 1 - 7 of the skeletal system.

e

f

g

b

c

d

a

J

C

K

A

F

B

D

Your collarbone, or (a)   , is a long slender bone that connects the breastbone, or (b)   , to the shoulder blade, or (c)   .

• clavicle

• sternum

• scapula

Answer explanation

Using the chart, help Bob label bones 8 - 13 of the skeletal system.

c

d

e

f

b

a

E

L

G (toes)

I

G (fingers)

H

The (a)   is the body's framework of bones. The (b)   is the body system of bones that makes blood cells and stores minerals.

• skeleton

• skeletal system

• muscular system

Answer explanation

An adult has 206 bones in their body that make up the skeleton.

What nutrient is needed to grow and repair muscles?

• Carbohydrates
• Protein
• Vitamin C
• Iron

Answer explanation

After working hard, skeletal muscles need rest.

Most skeletal muscles work (a)   . One muscle relaxes while its partner muscle tightens, or contracts. Each muscle does its work by (b)   , not (c)   .

• together in pairs

• pulling

• pushing

• separately

Match the descriptions to the correct terms.

• Skull

• Covers your brain

• Cranium

• Body system which provides movement

• Backbone (spinal column)

• Protects your heart and lungs

• Rib Cage

• Body's main support

• Muscular system

• Shields your brain, ears, and eyes from injuries

Answer explanation

Your skull is made of 22 bones that shield your brain, ears, and eyes from injuries. Your cranium is 8 flat bones that cover your brain.

The (a)   enables back and forth movement.

The (b)   enables rotational movement.

The (c)   enables movement in all directions.

• hinge joint

• pivot joint

• ball-and-socket joint

(a)   muscles are the skeletal muscles that move when you want them to move. (b)   muscles work automatically without you thinking about them. They include the cardiac muscle (heart) and smooth muscles which move food, liquids, and blood through the body.

• Voluntary
• Involuntary
• System

Answer explanation

Involuntary muscles are key parts of other vital body systems - circulatory system, digestive system, central nervous system