4 Bone Facts:Function - Your bones manufacture red blood cells and store useful minerals.Bones are held together by muscles that allow them to move.Some bones are joined by flexible parts called joints.Ligaments – connective tissue which holds bone in moveable joints. (A sprain is when ligaments are stretched too far.)The smallest bones are in your ear.The largest bone, the femur, is found in your thigh.
6 Living Bones The bones in your body are very much alive. Each is a living organ made of several different tissues.Like all the other living tissues in your body, bone tissue is made of cells that take in nutrients and use energy.Bone cells have the same needs as other body cells.
7 Functions of Your Skeletal System The skeleton gives shape and support to your body.Bones protect your internal organs.
8 Functions of Your Skeletal System Major muscles are attached to bone and help them move.Blood cells are made in the bone marrow.Calcium and phosphorous are stored in the skeleton for later use.
13 Bone StructureBones have bumps, edges, round ends, rough spots, and many pits and holes.Muscles and ligaments attach to some of the bumps and pits.In your body, blood vessels and nerves enter and leave through the holes.
15 Joint - Anyplace where two or more bones come together. Cartilage - Slick, smooth, slippery, flexible tissue that makes movement easier .Ligaments - A tough band of tissue that is attached to bones.
16 Cartilage – a connective tissue that is more flexible than bone. It reduces friction that would be caused by bones rubbing together.
17 Immovable JointsJoints are broadly classified as immovable or movable.An immovable joint allows little or no movement.Ex. skull and pelvis
28 Osteoporosis – mineral loss in bones where they become weak and break easily.
29 Scoliosis-Possible causes:congenital spine deformities, genetic conditions, neuromuscular problems, etc.-Over 80% of scoliosis cases, have no known cause and are found in otherwise healthy people.Interactive
38 Movement of the Human Body Muscle - an organ that can relax, contract, and provide the force to move your body parts.What is the difference between voluntary and involuntary muscles?
39 Involuntary Muscles – muscles you can’t control consciously. work all day longEx: circulatory and digestive muscles.
40 Voluntary muscles - Muscles that you are able to control .
41 Parts of the Muscular System Define each part of the Muscular System.Smooth MusclesSkeletal MusclesParts of the Muscular SystemCardiac MusclesTendons
42 Cardiac muscles Involuntary muscle that controls the heart. Types of Muscles:Cardiac muscles Involuntary muscle that controls the heart.Skeletal musclesVoluntary muscles that make us moveTHEY WORK IN PAIRS. Muscles always pull. They never push.Smooth muscles Involuntary muscles in organs and body systems.
43 the muscles that move bones muscles that work in pairs Skeletal Musclesthe muscles that move bonesmuscles that work in pairsTendons - Tissues that attach muscle to bones toenable movement .Walking bobby pin
51 Epidermis – Upper layer of thin skin where skin cells die and flake off. Dermis – Layer of cells below the epidermis where blood vessel and nerve endings are located.
52 List the 6 functions of the Integumentary / Skin Your Largest OrganYour skin is the largest organ of your body.Much of the information you receive about your environment comes through your skin.You can think of your skin as your largest sense organ.List the 6 functions of the Integumentary / SkinSystem.
53 Functions of Integumentary / Skin System Covers body and prevents water loss.Protects body from infection or injury.Regulates body temperature.Eliminates waste - salt and excess water.Gathers information from environment (Touch, etc.)Produces Vit. D to help digestive
55 Melanin Cells in the epidermis produce the chemical melanin. Melanin is a pigment that protects your skin and gives it color.The different amounts of melanin produced by cells causes differences in skin color.
56 MelaninWhen your skin is exposed to ultraviolet rays, melanin production increases and your skin becomes darker.Lighter skin tones have less protection from the SunSuch skin burns more easily and may be more susceptible to skin cancer.