A Volunteer Name three functions of the skin

A Volunteer…

Name three functions of the skin

Name three functions of the skin Protection

Name three functions of the skin Protection Receptors perceive the environment

Name three functions of the skin Protection Receptors perceive the environment Temperature Regulation

Integumentary System Explain the function

Integumentary System Skin is a multilayered organ that covers and protects the body

The Structure of the Skin The epidermis

The Structure of the Skin The epidermis The dermis

The Structure of the Skin The epidermis The subcutaneous

Epidermis Epithelial cells 10 -30 cells thick Outer layer is Keratin Waterproof Protects

Dermis Second layer 15 -40 x thicker Connective tissues (don’t tear) Contains: nerve cells, muscle fibers, sweat glands, oil glands and follicles

Subcutaneous Third layer Connective tissue Stores fat Helps body retain heat

The Skeletal System Chapter 32. 2 The function of the skeletal system

The Skeleton System Provides a framework Protects internal organs

The Skeleton 206 bones in the human body

Axial Skeleton Skull Vertebral column Ribs Sternum

Appendicular Skeleton Shoulders Arms Hands Hips Legs Feet

Bones Connective tissue Classified by terms: long, short, flat, irregular

Bones Compact bone Dense and strong Strength and protection

Bones Spongy bone Less dense Contains cavities for marrow

Marrow Red Yellow Red and white blood Store fat cells and platelets are produced

Repair of Bone Fractures common Compound fracture Stress fracture

Repair of Bone Endorphins Inflamed or swollen Blood clot in 8 hours Callus forms

Repair of Bone Endorphins Inflamed or swollen Blood clot in 8 hours Callus forms Remodeling Age Nutrition Location Severity

Joints Two or more bones meet Ball-and-socket Pivot Hinge Gliding Sutures

Name the white material at the end of a bone

The Muscular System Three types of muscles Smooth Cardiac Striated

Smooth muscle Involuntary Can’t be controlled Esophagus, stomach and intestines

Cardiac Muscle Heart muscle Involuntary Network or web

Striated Muscle Skeleton muscles Voluntary Tendons – tough bands of connective tissue Connects to bone

ATP Produced in mitochondria contraction of muscles relaxation of muscles

Fast-twitch muscles Rapid short movements Fatigue easily Short burst of energy