Presentation on theme: "KEY CONCEPT The skeletal system includes bones and tissues that are important for supporting, protecting, and moving your body."— Presentation transcript:
1 KEY CONCEPT The skeletal system includes bones and tissues that are important for supporting, protecting, and moving your body.
2 Your skeletal system is made up of the appendicular and axial skeletons. The skeletal system protects, supports, and moves the body.
3 The appendicular skeleton includes legs, arms, feet and hands. allows for movementincludes bones called girdles that connect limbs to body
4 The axial skeleton includes the skull, rib cage, and spinal column. supports body and protects tissuesallows for limited movementskullribbreastbonevertebra
5 Cartilage is connective tissue between bones. cushions bones allows for smooth movementconnect two bonescartilage
6 Bones connect to form joints. Joints are places were two bones meet.There are three types of joints.fibrous, which does not allow for movementfibrous joint
7 Bones connect to form joints. Joints are places were two bones meet.There are three types of joints.cartilaginous, which allows partial movementcartillage
8 Bones connect to form joints. Joints are places were two bones meet.There are three types of joints.synovial, which allows for greater movement
9 Ligaments are long bands of tissue that connect bones across a joint.
10 There are several types of synovial joints. gliding pivot ball-and-socketsaddlehingeGLIDING JOINTPIVOT JOINTBALL-AND-SOCKET JOINTSADDLE JOINTHINGE JOINT
11 Bones are living tissue. Bone is made of compact bone tissue and spongy bone tissue.Compact boneSpongy bone
12 Compact bone is hard and dense. Osteocytes (bone cells) maintain compact bone rings.Haversian canals allow blood vessels in the bone.blood vesselosteocytesHaversian canals
13 Spongy bone protects red or yellow bone marrow. Red bone marrow produces blood cells.Yellow bone marrow is mostly fat.PeriosteumA layer of connectivetissue that covers boneRed bone marrow
14 Calcification is the process of building hard bone. combines collagen and calcium phosphatetransforms cartilage into hard bone during childhoodosteocytecompact bone
15 KEY CONCEPT 33.2 Muscles are tissues that can contract, enabling movement.
16 Humans have three types of muscle. The muscular system moves substances throughout the body.bones of the skeletal systemfood through digestive systemblood through circulatory systemfluids through excretory system
17 There are three types of muscle tissue. skeletal muscle smooth muscle cardiac muscleSKELETAL MUSCLESMOOTH MUSCLECARDIAC MUSCLE
18 Skeletal muscle attaches to the skeleton by tendons. Tendons connect muscle to bone.Skeletal muscles are mostly voluntary.SKELETAL MUSCLE
19 Smooth muscle lines organs and is involuntary. move food through digestive organsempty liquid from the bladdercontrol width of blood vesselsSmooth musclearound this artery allows theartery to regulate blood flowby shrinking and expanding.SMOOTH MUSCLE
20 Cardiac muscle is found only in the heart. pumps blood throughout body controlled by pacemakercontains more mitochondria than skeletal muscle cellsCARDIAC MUSCLE
21 Muscle fibers are cells of the muscular system. Muscles contract when the nervous systems causes muscle filaments to move.Muscle fibers are cells of the muscular system.musclemuscle fiber
22 Myofibrils are long strands of protein in the muscle fiber.
23 Each myofibril is divided into sarcomeres. Sarcomeres contain filaments that cause contraction.myofibrilmuscle fibermusclesarcomere
24 Each myofibril is divided into sarcomeres. Sarcomeres contain filaments that cause contraction.Actin filaments are pulled during contraction.Myosin filaments pull actin during contraction.CONTRACTIONRELAXATIONM linemyosinZ line
25 Neuron stimulates muscle at the neuromuscular junction.
26 Neuron stimulates muscle at the neuromuscular junction. Neurotransmitters cause calcium channels in the sarcomere to open.regulatory proteinCalcium exposes binding sites.Myosin binds to actin and pulls it.As the sarcomere shortens, the muscle contracts.myosinactinZ line
27 KEY CONCEPT 33.3 The integumentary system has many tissues that protect the body.
28 The integumentary system helps maintain homeostasis. The integument is the body system that surrounds all your other organ systems.
29 The integumentary system helps maintain homeostasis. The integumentary system consists of many parts.skinhairnailsoil glandssweat glandsproteins, such as keratin
30 Integumentary system removes substances from the body. water salts ureaporesweatglands
31 The integumentary system consists of many different tissues. The outermost layer of the skin is the epidermis.dead skin cellsoilsporesepidermispore
32 Cells in the epidermis produce keratin and melanin. Keratin makes cells waterproof and tough feeling.Melanin is a dark pigment that absorbs UV rays.
33 The dermis contains most of the tissues in the skin. sweat glands oil glandspressure receptorsblood vesselshair folliclesdermishair follicleoil glandpressurereceptorssweat gland
34 A hair follicle is pit of cells that produces hair. The dermis also produces elastin and collagen.Elastin makes skin flexible.Collagen gives skin its shape.
35 Beneath the dermis is a layer of fat. fat layer