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Function:  Provides shape and support  Allows movement  Protects tissues and organs  Stores certain minerals  Produces blood cells.

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Presentation on theme: "Function:  Provides shape and support  Allows movement  Protects tissues and organs  Stores certain minerals  Produces blood cells."— Presentation transcript:

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2 Function:  Provides shape and support  Allows movement  Protects tissues and organs  Stores certain minerals  Produces blood cells

3  Bones- A solid network of living cells and protein fibers that are surrounded by deposits of calcium. Structures of a bone:  Periosteum- The tough layer outer layer of the bone.  Compact Bone- contains Haversian canals that contain blood vessels and nerves  Spongy Bone- found in the ends of bones and produces RBC.  Yellow bone Marrow- made of fat cells.  Red Marrow- Produces RBC, WBC, and platelets.

4  Cartilage- Strong, connective tissue that supports the body. Softer and more flexible than bone *There are approximately 206 bones in the human body.*

5  Cartilage is gradually replaced by bone during a process called ossification.  Osteoblasts secrete mineral deposits that replace cartilage in developing bones.  Osteocytes help maintain the minerals in bone tissue and continue to strengthen the growing bone.

6  Ligaments- Hold bone to bone. Example: Hold bones together in knee; ACL.  Tendons- Hold muscle to the bones. Example: Achilles tendon attaches to the calf.

7  Joint- is any place where two bones come together. -Types of Joints: ① Movable- prevent movement in one or more directions. Examples: pivot joint (radius and ulna); ball and socket (arm into shoulder) ② Semi-movable- allow a little bit of restricted movement. Example: Vertebrae. ③ Immovable- allow no movement at all. Example: Skull

8 Arthritis: Inflammation of joints Osteoporosis: loss of calcium in bones leading to weakening of bones

9 Function: Communication of pain, pressure, temperature Protection of body: Prevents dehydration Regulates body temperature Barrier for disease/infection Covers and holds in organs Removes waste products Barrier for sun’s UV rays

10  Epidermis: Outermost layer - Two layers: -Inner layer: living cells -Outer layer: dead cells - Contains : -Keratin- waterproofing -Melanocytes- produces pigment

11 Dermis: middle layer Contains: -Hair follicles/roots -Sweat glands -Sebaceous (oil) glands -Arrector pili muscle -Nerves -Blood Vessels

12 Hypodermis (Subcutaneous Layer): Innermost layer Contains: Adipose (fat) cells: cushion, insulation, anchors skin. Blood vessels: temp. regulation, nutrients, etc. Nerves: temp., pressure, pain

13 Hair- made of dead epidermal cells. Function: protect skin from UV rays (on head); provide insulation from cold; hairs in nose, ears, eyelashes prevent dirt and other particles from entering body. Nails- Sheets of keratinized cells Function: protects tips of fingers/toes

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