Growing
Skin
Mouth
Muscles
Muscle Types
Fitness
Terms
Skeleton
100
Process of physical changes during adolescence

Puberty

100

Outer layer of skin

Epidermis

100

Soft tissue within the dentin that contains nerves and blood vessels

Pulp

100

Muscles that cover the abdomen; help balance and posture

Abdominal muscles

100

Group of muscles in the back of the upper leg; bend the knee

Hamstrings

100

Body's ability to function at its best during daily physical activities without tiring easily

Physical fitness

100

Place where two or more bones join

Joint

100

Framework of bones that support and protect the body

Skeletal system

200

Transitional time of growth and development between childhood and adulthood

Adolescence

200

Inner layer of skin beneath the epidermis

Dermis

200

Protective outer covering of a tooth's crown; hardest substance in the body

Enamel

200

Body system that provides movement

Muscular system

200

Upper-arm muscle that straightens the arm

Triceps

200

The steady contraction of muscles against each other

Muscle tone
200

Soft tissue in the open spaces of a bone

Bone marrow

200

Bone that is longer than it is wide and has enlarged ends

Long bone

300

Chemical messenger that regulates how the body works

Hormone

300

Layer of fat cells below the dermis; deepest layer of the integumentary system

Hypodermis

300

Film of harmful bacteria that forms on teeth

Plaque

300

Muscles that work automatically without your thinking about them

Involuntary muscles

300

Upper-arm muscle that bends the arm

Biceps

300

Exercise that causes muscles to use more oxygen; endurance exercise

Aerobic exercise

300

Small tube in the dermis that makes hair

Hair follicle

300

Strong, elastic band of fibrous tissue that connects bones and stabilizes joints

Ligament

400

Cleanliness habits that prevent disease and promote health

Hygiene

400

Skin condition in which clogged pores cause blemishes, or pimples

Acne

400

Hard, bone-like tissue that gives a tooth its shape

Dentin

400
Skeletal muscles that can be moved when you want them to move

Voluntary muscles

400

Muscle that forms the curve of the shoulder and lifts the arm

Deltoid

400

Exercise in which muscles do not use more oxygen; requires strength, speed, and agility rather than endurance

Anaerobic exercise

400

Group of muscles in the front of the upper leg; straighten the knee

Quadriceps

400

Lightweight, porous tissue that reduces a bone's weight

Spongy bone
500

Body system that covers and protects the body; includes the skin, hair, and nails

Integumentary system

500

Oily substance produced by the sebaceous glands

Sebum

500

Disease caused by bacteria inside the mouth; also called cavities

Dental caries

500

Cord of white fibers that connects muscle to bone

Tendon

500

Back muscle that moves the shoulder and turns the head

Trapezius

500

Waste product formed during strenuous exercise

Lactic acid

500

Division of the skeleton that includes the head, spine, and ribs

Axial skeleton

500

Division of the skeleton that includes the shoulders, hips, arms, and legs

Appendicular skeleton